2010 Cadillac STS Owners Manual

Turn off cruise control.

5-17

Before Leaving on a Long Trip To prepare your vehicle for a long trip, consider having it serviced by your dealer/retailer before departing. Things to check on your own include:

. Windshield Washer Fluid: Reservoir full? Windows

clean — inside and outside?

. Wiper Blades: In good shape?

Fuel, Engine Oil, Other Fluids: All levels checked? Lamps: Do they all work and are lenses clean? Tires: Are treads good? Are tires inflated to recommended pressure?

. Weather and Maps: Safe to travel? Have

up-to-date maps?

Highway Hypnosis Always be alert and pay attention to your surroundings while driving. If you become tired or sleepy, find a safe place to park your vehicle and rest. Other driving tips include:

. Keep the vehicle well ventilated. . Keep interior temperature cool. . Keep your eyes moving — scan the road ahead

and to the sides.

. Check the rearview mirror and vehicle instruments

often.

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Hill and Mountain Roads Driving on steep hills or through mountains is different than driving on flat or rolling terrain. Tips for driving in these conditions include:

. Keep the vehicle serviced and in good shape. . Check all fluid levels and brakes, tires, cooling

system, and transmission.

. Going down steep or long hills, shift to a

lower gear.

{ WARNING:

If you do not shift down, the brakes could get so hot that they would not work well. You would then have poor braking or even none going down a hill. You could crash. Shift down to let the engine assist the brakes on a steep downhill slope.

{ WARNING:

Coasting downhill in N (Neutral) or with the ignition off is dangerous. The brakes will have to do all the work of slowing down and they could get so hot that they would not work well. You would then have poor braking or even none going down a hill. You could crash. Always have the engine running and the vehicle in gear when going downhill.

. Stay in your own lane. Do not swing wide or cut

across the center of the road. Drive at speeds that let you stay in your own lane. Top of hills: Be alert — something could be in your lane (stalled car, accident).

. Pay attention to special road signs (falling rocks

area, winding roads, long grades, passing or no-passing zones) and take appropriate action.

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Winter Driving Driving on Snow or Ice Drive carefully when there is snow or ice between the tires and the road, creating less traction or grip. Wet ice can occur at about 0°C (32°F) when freezing rain begins to fall, resulting in even less traction. Avoid driving on wet ice or in freezing rain until roads can be treated with salt or sand. Drive with caution, whatever the condition. Accelerate gently so traction is not lost. Accelerating too quickly causes the wheels to spin and makes the surface under the tires slick, so there is even less traction. Try not to break the fragile traction. If you accelerate too fast, the drive wheels will spin and polish the surface under the tires even more.

The Traction Control System (TCS) on page 5‑9
improves the ability to accelerate on slippery roads, but slow down and adjust your driving to the road conditions. When driving through deep snow, turn off the traction control system to help maintain vehicle motion at lower speeds. The Antilock Brake System (ABS) on page 5‑5
improves vehicle stability during hard stops on a slippery roads, but apply the brakes sooner than when on dry pavement. Allow greater following distance on any slippery road and watch for slippery spots. Icy patches can occur on otherwise clear roads in shaded areas. The surface of a curve or an overpass can remain icy when the surrounding roads are clear. Avoid sudden steering maneuvers and braking while on ice. Turn off cruise control, if equipped, on slippery surfaces.

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Blizzard Conditions Being stuck in snow can be in a serious situation. Stay with the vehicle unless there is help nearby. If possible, use the Roadside Service on page 8‑8 . To get help and keep everyone in the vehicle safe:

Turn on the Hazard Warning Flashers on page 4‑3 . Tie a red cloth to an outside mirror.

{ WARNING:

Snow can trap engine exhaust under the vehicle. This may cause exhaust gases to get inside. Engine exhaust contains carbon monoxide (CO) which cannot be seen or smelled. It can cause unconsciousness and even death. If the vehicle is stuck in the snow: . Clear away snow from around the base of

your vehicle, especially any that is blocking the exhaust pipe.

. Check again from time to time to be sure

snow does not collect there.

(Continued)

WARNING: (Continued)

. Open a window about 5 cm (two inches) on the side of the vehicle that is away from the wind to bring in fresh air. Fully open the air outlets on or under the instrument panel.

. Adjust the Climate Control system to a setting

that circulates the air inside the vehicle and set the fan speed to the highest setting. See Climate Control System in the Index.

For more information about carbon monoxide, see Engine Exhaust on page 3‑36. Snow can trap exhaust gases under your vehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcome you and kill you. You cannot see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking the exhaust.

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To save fuel, run the engine for only short periods as needed to warm the vehicle and then shut the engine off and close the window most of the way to save heat. Repeat this until help arrives but only when you feel really uncomfortable from the cold. Moving about to keep warm also helps. If it takes some time for help to arrive, now and then when you run the engine, push the accelerator pedal slightly so the engine runs faster than the idle speed. This keeps the battery charged to restart the vehicle and to signal for help with the headlamps. Do this as little as possible to save fuel. If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow Slowly and cautiously spin the wheels to free the vehicle when stuck in sand, mud, ice, or snow. See Rocking Your Vehicle to Get It Out on page 5‑23.

If the vehicle has a traction system, it can often help to free a stuck vehicle. Refer to the vehicle's traction system in the Index. If stuck too severely for the traction system to free the vehicle, turn the traction system off and use the rocking method.

{ WARNING:

If the vehicle's tires spin at high speed, they can explode, and you or others could be injured. The vehicle can overheat, causing an engine compartment fire or other damage. Spin the wheels as little as possible and avoid going above 55 km/h (35 mph) as shown on the speedometer.

For information about using tire chains on the vehicle, see Tire Chains on page 6‑76.

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Rocking Your Vehicle to Get It Out Turn the steering wheel left and right to clear the area around the front wheels. Turn off any traction or stability system. Shift back and forth between R (Reverse) and a forward gear, spinning the wheels as little as possible. To prevent transmission wear, wait until the wheels stop spinning before shifting gears. Release the accelerator pedal while shifting, and press lightly on the accelerator pedal when the transmission is in gear. Slowly spinning the wheels in the forward and reverse directions causes a rocking motion that could free the vehicle. If that does not get the vehicle out after a few tries, it might need to be towed out. If the vehicle does need to be towed out, see Towing Your Vehicle on page 5‑29.

Loading the Vehicle It is very important to know how much weight your vehicle can carry. This weight is called the vehicle capacity weight and includes the weight of all occupants, cargo, and all nonfactory‐installed options. Two labels on your vehicle show how much weight it may properly carry, the Tire and Loading Information label, and the Certification label.

{ WARNING:

Do not load the vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (GAWR). If you do, parts on the vehicle can break, and it can change the way the vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of the vehicle.

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(striker). The Tire and Loading Information label shows the number of occupant seating positions (A), and the maximum vehicle capacity weight (B) in kilograms and pounds. The Tire and Loading Information label also shows the tire size of the original equipment tires (C) and the recommended cold tire inflation pressures (D). For more information on tires and inflation see Tires on page 6‑52 and Inflation - Tire Pressure on page 6‑60. There is also important loading information on the Certification label. It tells you the Gross Vehicle Weight Rating (GVWR) and the Gross Axle Weight Rating (GAWR) for the front and rear axle; see “Certification Label” later in this section.

Tire and Loading Information Label

Example Label

A vehicle specific Tire and Loading Information label is attached to the vehicle's center pillar (B-pillar). With the driver's door open, you will find the label attached below the door lock post

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Steps for Determining Correct Load Limit 1. Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs” on your vehicle's placard.

2. Determine the combined weight of the driver

and passengers that will be riding in your vehicle.

3. Subtract the combined weight of the driver and passengers from XXX kg or XXX lbs.

4. The resulting figure equals the available

amount of cargo and luggage load capacity. For example, if the “XXX” amount equals 1400 lbs and there will be five 150 lb passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lbs (1400 − 750 (5 x 150) = 650 lbs).

6.

5. Determine the combined weight of luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in Step 4. If your vehicle will be towing a trailer, the load from your trailer will be transferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle. See Towing a Trailer on page 5‑31 for important information on towing a trailer, towing safety rules and trailering tips.

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Example 1

Example 2

Item

Description Vehicle Capacity Weight for Example 1 = Subtract Occupant Weight @ 150 lbs (68 kg) × 2 = Available Occupant and Cargo Weight =

Total

Item

1,000 lbs (453 kg)

300 lbs (136 kg)

700 lbs (317 kg)

Description Vehicle Capacity Weight for Example 2 = Subtract Occupant Weight @ 150 lbs (68 kg) × 5 = Available Cargo Weight =

Total

1,000 lbs (453 kg)

750 lbs (340 kg)

250 lbs (113 kg)

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positions. The combined weight of the driver, passengers, and cargo should never exceed your vehicle's capacity weight. Certification Label

Example 3

Item

Description Vehicle Capacity Weight for Example 3 = Subtract Occupant Weight @ 200 lbs (91 kg) × 5 = Available Cargo Weight =

Total

1,000 lbs (453 kg)

1,000 lbs (453 kg)

0 lbs (0 kg)

Refer to your vehicle's Tire and Loading Information label for specific information about your vehicle's capacity weight and seating

A vehicle specific Certification label is attached to either the driver's door edge or the lower center pillar on the driver's side of the vehicle. This label shows the gross weight capacity of your vehicle, called the Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle, all occupants, fuel, and cargo. The Certification label also shows the maximum weights for the front and

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rear axles, called the Gross Axle Weight Rating (GAWR). Never exceed the GVWR or the GAWR for either the front or rear axle.

{ WARNING:

Things you put inside the vehicle can strike and injure people in a sudden stop or turn, or in a crash. . Put things in the cargo area of the

vehicle. In the cargo area, put them as far forward as you can. Try to spread the weight evenly.

. Never stack heavier things, like

suitcases, inside the vehicle so that some of them are above the tops of the seats. . Do not leave an unsecured child restraint

in the vehicle.

. When you carry something inside the vehicle, secure it whenever you can.

. Do not leave a seat folded down unless

you need to.

{ WARNING:

Do not load the vehicle any heavier than the Gross Vehicle Weight Rating (GVWR), or either the maximum front or rear Gross Axle Weight Rating (GAWR). If you do, parts on the vehicle can break, and it can change the way the vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of the vehicle.

Notice : Overloading the vehicle may cause damage. Repairs would not be covered by the vehicle warranty. Do not overload the vehicle. If you put things inside your vehicle, like suitcases, tools, packages, or anything else, they will go as fast as the vehicle goes. If you have to stop or turn quickly, or if there is a crash, they will keep going.

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Towing

Towing Your Vehicle Consult your dealer/retailer or a professional towing service if the disabled vehicle needs to be towed. See Roadside Service on page 8‑8. To tow the vehicle behind another vehicle for recreational purposes (such as behind a motorhome), see Recreational Vehicle Towing following. Recreational Vehicle Towing Recreational vehicle towing means towing the vehicle behind another vehicle – such as behind a motorhome. The two most common types of recreational vehicle towing are known as “dinghy towing” — towing the vehicle with all four wheels on the ground, and “dolly towing” — towing the vehicle with two wheels on the ground and two wheels up on a device known as a “dolly”.

Here are some important things to consider before recreational vehicle towing:

. What is the towing capacity of the towing vehicle?

Be sure to read the tow vehicle manufacturer's recommendations.

. What is the distance that will be travelled? Some

vehicles have restrictions on how far and how long they can tow. Is the proper towing equipment going to be used? See your dealer/retailer or trailering professional for additional advice and equipment recommendations. Is the vehicle ready to be towed? Just as preparing the vehicle for a long trip, make sure the vehicle is prepared to be towed. See Before Leaving on a Long Trip on page 5‑18.

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Dinghy Towing Notice: If the vehicle is towed with all four wheels on the ground, the drivetrain components could be damaged. The repairs would not be covered by the vehicle warranty. Do not tow the vehicle with all four wheels on the ground. The vehicle was not designed to be towed with all four wheels on the ground. If the vehicle must be towed, use a dolly. See “Dolly Towing” later in this section for more information. Dolly Towing (Rear‐Wheel‐Drive Vehicles) Notice: Dolly towing or dinghy towing the vehicle may cause damage because of reduced ground clearance. Always tow the vehicle using the towing procedures listed in this section or put the vehicle on a flatbed truck or trailer.

5-30

Rear‐wheel drive vehicles can be towed using a dolly. To tow the vehicle using a dolly, follow these steps: 1. Attach the dolly to the tow vehicle following the

dolly manufacturer's instructions.

2. Drive the rear wheels onto the dolly.

3. Firmly set the parking brake. See Parking Brake

on page 3‑33 .

4. Put the transmission in P (Park). 5. Secure the vehicle to the dolly following the

manufacturer's instructions.

6. Use an adequate clamping device designed for

towing to ensure that the front wheels are locked into the straight position.

7. Turn the ignition to LOCK/OFF. Dolly Towing (All‐Wheel‐Drive Vehicles) Notice: Towing an all-wheel-drive vehicle with all four wheels on the ground, or even with only two of its wheels on the ground, will damage drivetrain components. Do not tow an all-wheel-drive vehicle with any of its wheels on the ground. All‐Wheel Drive (AWD) vehicles can only be towed on a flat‐bed truck or trailer.

Towing a Trailer

{ WARNING:

The driver can lose control when pulling a trailer if the correct equipment is not used or the vehicle is not driven properly. For example, if the trailer is too heavy, the brakes may not work well — or even at all. The driver and passengers could be seriously injured. The vehicle may also be damaged; the resulting repairs would not be covered by the vehicle warranty. Pull a trailer only if all the steps in this section have been followed. Ask your dealer/retailer for advice and information about towing a trailer with the vehicle.

To identify the trailering capacity of the vehicle, read the information in “Weight of the Trailer” that appears later in this section.

5-31

Trailering is different than just driving the vehicle by itself. Trailering means changes in handling, acceleration, braking, durability and fuel economy. Successful, safe trailering takes correct equipment, and it has to be used properly. The following information has many time-tested, important trailering tips and safety rules. Many of these are important for your safety and that of your passengers. So please read this section carefully before pulling a trailer. Load-pulling components such as the engine, transmission, rear axle, wheel assemblies and tires are forced to work harder against the drag of the added weight. The engine is required to operate at relatively higher speeds and under greater loads, generating extra heat. The trailer also adds considerably to wind resistance, increasing the pulling requirements.

Pulling A Trailer Here are some important points:

. Do not tow a trailer at all during the first 500 miles

(800 km) the new vehicle is driven. The engine, axle or other parts could be damaged. Then, during the first 500 miles (800 km) that a trailer is towed, do not drive over 50 mph (80 km/h) and do not make starts at full throttle. This helps the engine and other parts of the vehicle wear in at the heavier loads.

. Vehicles can tow in D (Drive). Shift the

transmission to a lower gear if the transmission shifts too often under heavy loads and/or hilly conditions.

. Obey speed limit restrictions when towing a trailer.

Do not drive faster than the maximum posted speed for trailers, or no more than 55 mph (90 km/h), to save wear on the vehicle's parts. If the vehicle has the Side Blind Zone Alert (SBZA) system and it doesn't seem to be working properly while pulling a trailer, turn the system off. See Side Blind Zone Alert (SBZA) on page 3‑44 for more information.

5-32

Three important considerations have to do with weight:

The weight of the trailer. The weight of the trailer tongue. The total weight on the vehicle's tires.

Weight of the Trailer How heavy can a trailer safely be? It should never weigh more than 1,000 lbs (450 kg). But even that can be too heavy. It depends on how the rig is used. For example, speed, altitude, road grades, outside temperature and how much the vehicle is used to pull a trailer are all important. It can depend on any special equipment on the vehicle, and the amount of tongue weight the vehicle can carry. See “Weight of the Trailer Tongue” later in this section for more information. Maximum trailer weight is calculated assuming only the driver is in the tow vehicle and it has all the required trailering equipment. The weight of additional optional equipment, passengers and cargo in the tow vehicle must be subtracted from the maximum trailer weight. Ask your dealer/retailer for our trailering information or advice, or write us at our Customer Assistance Offices. See Customer Assistance Offices on page 8‑6 for more information.

Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total gross weight of the vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, and the people who will be riding in the vehicle. If there are a lot of options, equipment, passengers or cargo in the vehicle, it will reduce the tongue weight the vehicle can carry, which will also reduce the trailer weight the vehicle can tow. If towing a trailer, the tongue load must be added to the GVW because the vehicle will be carrying that weight, too. See Loading the Vehicle on page 5‑23 for more information about the vehicle's maximum load capacity.

If using a weight-carrying hitch, the trailer tongue (A) should weigh 10 to 15 percent of the total loaded trailer weight (B).

5-33

After loading the trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they are not, adjustments might be made by moving some items around in the trailer. Total Weight on the Vehicle's Tires Be sure the vehicle's tires are inflated to the upper limit for cold tires. These numbers can be found on the Certification label or see Loading the Vehicle on page 5‑23 . Make sure not to go over the GVW limit for the vehicle, or the GAWR, including the weight of the trailer tongue. Hitches It is important to have the correct hitch equipment. Crosswinds, large trucks going by and rough roads are a few reasons why the right hitch is needed.

The rear bumper on the vehicle is not intended for hitches. Do not attach rental hitches or other bumper-type hitches to it. Use only a frame-mounted hitch that does not attach to the bumper.

. Will any holes be made in the body of the vehicle when the trailer hitch is installed? If so, be sure to seal the holes when the hitch is removed. If they are not sealed, deadly carbon monoxide (CO) from the engine's exhaust can get into the vehicle. See Engine Exhaust on page 3‑36 . Sealing the holes will also prevent dirt and water from entering the vehicle.

Safety Chains Always attach chains between the vehicle and the trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated from the hitch. Instructions about safety chains may be provided by the hitch manufacturer or by the trailer manufacturer. Follow the manufacturer's recommendation for attaching safety chains and do not attach them to the bumper. Always leave just enough slack so the rig can turn. Never allow safety chains to drag on the ground.

5-34

Trailer Brakes Does the trailer have its own brakes? Be sure to read and follow the instructions for the trailer brakes so they are installed, adjusted and maintained properly. Because the vehicle has StabiliTrak®, do not try to tap into the vehicle's hydraulic brake system. If you do, both brake systems will not work well, or at all. Trailer Wiring Harness All of the electrical circuits required for the trailer lighting system can be accessed at the driver side rear lamp connector. This connector is located under the carpet on the rear corner of the trunk compartment. Driving with a Trailer Towing a trailer requires a certain amount of experience. Get to know the rig before setting out for the open road. Get acquainted with the feel of handling and braking with the added weight of the trailer. And always keep in mind that the vehicle you are driving is now longer and not as responsive as the vehicle is by itself.

Before starting, check all trailer hitch parts and attachments, safety chains, electrical connectors, lamps, tires and mirror adjustments. If the trailer has electric brakes, start the vehicle and trailer moving and then apply the trailer brake controller by hand to be sure the brakes are working. This checks the electrical connection at the same time. During the trip, check occasionally to be sure that the load is secure, and that the lamps and any trailer brakes are still working. Following Distance Stay at least twice as far behind the vehicle ahead as you would when driving the vehicle without a trailer. This can help to avoid situations that require heavy braking and sudden turns. Passing More passing distance is needed when towing a trailer. Because the rig is longer, it is necessary to go much farther beyond the passed vehicle before returning to the lane.

5-35

Backing Up Hold the bottom of the steering wheel with one hand. Then, to move the trailer to the left, move that hand to the left. To move the trailer to the right, move your hand to the right. Always back up slowly and, if possible, have someone guide you. Making Turns Notice: Making very sharp turns while trailering could cause the trailer to come in contact with the vehicle. The vehicle could be damaged. Avoid making very sharp turns while trailering. When turning with a trailer, make wider turns than normal. Do this so the trailer will not strike soft shoulders, curbs, road signs, trees or other objects. Avoid jerky or sudden maneuvers. Signal well in advance.

Turn Signals When Towing a Trailer The arrows on the instrument panel flash whenever signaling a turn or lane change. Properly hooked up, the trailer lamps also flash, telling other drivers the vehicle is turning, changing lanes or stopping. When towing a trailer, the arrows on the instrument panel flash for turns even if the bulbs on the trailer are burned out. For this reason you may think other drivers are seeing the signal when they are not. It is important to check occasionally to be sure the trailer bulbs are still working. The vehicle has bulb warning lights. When a trailer lighting system is plugged into the vehicle's lighting system, its bulb warning lights may not let you know if one of the lamps goes out. So, when the trailer lighting system is plugged in, be sure to check the vehicle and trailer lamps from time to time to be sure they are all working. Once the trailer lamps are disconnected, the bulb warning lights again can tell you if one of the vehicle lamps is out.

5-36

Driving On Grades Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might have to be used so much that they would get hot and no longer work well. On a long uphill grade, shift down and reduce the vehicle's speed to around 45 mph (70 km/h) to reduce the possibility of the engine and the transmission overheating. Vehicles can tow in D (Drive). Shift the transmission to a lower gear if the transmission shifts too often under heavy loads and/or hilly conditions. When towing at high altitude on steep uphill grades, consider the following: Engine coolant will boil at a lower temperature than at normal altitudes. If the engine is turned off immediately after towing at high altitude on steep uphill grades, the vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked, preferably on level ground, with the automatic transmission in P (Park) for a few minutes before turning the engine off. If the overheat warning comes on, see Engine Overheating on page 6‑32.

Parking on Hills

{ WARNING:

Parking the vehicle on a hill with the trailer attached can be dangerous. If something goes wrong, the rig could start to move. People can be injured, and both the vehicle and the trailer can be damaged. When possible, always park the rig on a flat surface.

If parking the rig on a hill:

1. Press the brake pedal, but do not shift into P (Park) yet. Turn the wheels into the curb if facing downhill or into traffic if facing uphill.

2. Have someone place chocks under the trailer

wheels.

3. When the wheel chocks are in place, release the regular brakes until the chocks absorb the load. 4. Reapply the brake pedal. Then apply the parking

brake and shift into P (Park).

5. Release the brake pedal.

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Leaving After Parking on a Hill 1. Apply and hold the brake pedal while you:

. Start the engine . Shift into a gear . Release the parking brake

2. Let up on the brake pedal. 3. Drive slowly until the trailer is clear of the chocks. 4. Stop and have someone pick up and store the

chocks.

Maintenance When Trailer Towing The vehicle needs service more often when pulling a trailer. See this manual's Maintenance Schedule or Index for more information. Things that are especially important in trailer operation are automatic transmission fluid, engine oil, axle lubricant, belts, cooling system and brake system. It is a good idea to inspect these before and during the trip. Check periodically to see that all hitch nuts and bolts are tight. Engine Cooling When Trailer Towing The cooling system may temporarily overheat during severe operating conditions. See Engine Overheating on page 6‑32 .

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Section 6

Service and Appearance Care

Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Accessories and Modifications . . . . . . . . . . . . . . . . . . 6-4
California Proposition 65 Warning . . . . . . . . . . . . . . . 6-5
California Perchlorate Materials

Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Doing Your Own Service Work . . . . . . . . . . . . . . . . . . 6-5
Adding Equipment to the Outside of the

Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Gasoline Octane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Gasoline Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
California Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Fuels in Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 6-8
Filling the Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Filling a Portable Fuel Container . . . . . . . . . . . . . . . 6-11
Checking Things Under the Hood . . . . . . . . . . . . . . . 6-12
Hood Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12
Engine Compartment Overview . . . . . . . . . . . . . . . . 6-13
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-18
Engine Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . . 6-23
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . 6-25
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-26
Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27
Engine Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-32

Overheated Engine Protection

Operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Power Steering Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 6-35
Windshield Washer Fluid . . . . . . . . . . . . . . . . . . . . . . 6-36
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-37
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40
Jump Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-40
All-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-45
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-46
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-47
Headlamp Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-48
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49
High Intensity Discharge (HID) Lighting . . . . . . . . 6-49
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49
Back-Up Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-50
Replacement Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-50
Windshield Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 6-50
Windshield Wiper Blade Replacement . . . . . . . . . . . 6-51
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-52
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-53
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . . . . . . . . . 6-54
Tire Terminology and Definitions . . . . . . . . . . . . . . . 6-57
Inflation - Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . 6-60
High-Speed Operation . . . . . . . . . . . . . . . . . . . . . . . . . 6-62

6-1

Section 6

Service and Appearance Care

Tire Pressure Monitor System . . . . . . . . . . . . . . . . . 6-62
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . 6-64
Tire Inspection and Rotation . . . . . . . . . . . . . . . . . . . 6-67
When It Is Time for New Tires . . . . . . . . . . . . . . . . . 6-69
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-70
Different Size Tires and Wheels . . . . . . . . . . . . . . . 6-72
Uniform Tire Quality Grading . . . . . . . . . . . . . . . . . . . 6-73
Wheel Alignment and Tire Balance . . . . . . . . . . . . 6-74
Wheel Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-74
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-76
Tire Sealant and Compressor Kit

(Without Selector Switch) . . . . . . . . . . . . . . . . . . . . 6-78

Tire Sealant and Compressor Kit

(With Selector Switch) . . . . . . . . . . . . . . . . . . . . . . . 6-87
Tire Sealant and Compressor Kit Storage . . . . . . 6-96
Changing a Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-96
Removing the Spare Tire and Tools . . . . . . . . . . . . 6-98
Removing the Flat Tire and Installing the

Spare Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-99
Storing a Flat or Spare Tire and Tools . . . . . . . . 6-105
Compact Spare Tire . . . . . . . . . . . . . . . . . . . . . . . . . . 6-107

Appearance Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-108
Interior Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-108
Fabric/Carpet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-109
Leather . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-110
Instrument Panel, Vinyl, and Other Plastic

Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-110
Wood Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Speaker Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Care of Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Weatherstrips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Washing Your Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 6-111
Cleaning Exterior Lamps/Lenses . . . . . . . . . . . . . 6-112
Finish Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-112
Windshield and Wiper Blades . . . . . . . . . . . . . . . . . 6-113
Aluminum or Chrome-Plated Wheels

and Trim . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-114
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-115
Sheet Metal Damage . . . . . . . . . . . . . . . . . . . . . . . . . 6-115
Finish Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-115
Underbody Maintenance . . . . . . . . . . . . . . . . . . . . . . 6-115
Chemical Paint Spotting . . . . . . . . . . . . . . . . . . . . . . 6-115

6-2

Section 6

Service and Appearance Care

Vehicle Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Vehicle Identification Number (VIN) . . . . . . . . . . . 6-116
Service Parts Identification Label . . . . . . . . . . . . . 6-116
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-116
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . 6-116
Headlamp Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-117
Windshield Wiper Fuses . . . . . . . . . . . . . . . . . . . . . . 6-117

Power Windows and Other Power Options . . . 6-117
Fuses and Circuit Breakers . . . . . . . . . . . . . . . . . . . 6-117
Underhood Fuse Block . . . . . . . . . . . . . . . . . . . . . . . 6-118
Rear Underseat Fuse Block . . . . . . . . . . . . . . . . . . 6-122
Capacities and Specifications . . . . . . . . . . . . . . . . . . 6-130

6-3

Service For service and parts needs, visit your dealer/retailer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks:

Accessories and Modifications When non‐dealer/non‐retailer accessories are added to the vehicle, they can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissions systems, aerodynamics, durability, and electronic systems like antilock brakes, traction control, and stability control. Some of these accessories could even cause malfunction or damage not covered by the vehicle warranty. Damage to vehicle components resulting from the installation or use of non‐GM certified parts, including control module modifications, is not covered under the terms of the vehicle warranty and may affect remaining warranty coverage for affected parts. GM Accessories are designed to complement and function with other systems on the vehicle. Your GM dealer/retailer can accessorize the vehicle using genuine GM Accessories. When you go to your GM dealer/retailer and ask for GM Accessories, you will know that GM-trained and supported service technicians will perform the work using genuine GM Accessories. Also, see Adding Equipment to Your Airbag-Equipped Vehicle on page 2‑66.

6-4

California Proposition 65 Warning Most motor vehicles, including this one, contain and/or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Engine exhaust, many parts and systems, many fluids, and some component wear by-products contain and/or emit these chemicals. California Perchlorate Materials Requirements Certain types of automotive applications, such as airbag initiators, seat belt pretensioners, and lithium batteries contained in remote keyless transmitters, may contain perchlorate materials. Special handling may be necessary. For additional information, see www.dtsc.ca.gov/hazardouswaste/perchlorate.

Doing Your Own Service Work

{ WARNING:

You can be injured and the vehicle could be damaged if you try to do service work on a vehicle without knowing enough about it. . Be sure you have sufficient knowledge,

experience, the proper replacement parts, and tools before attempting any vehicle maintenance task.

. Be sure to use the proper nuts, bolts, and

other fasteners. English and metric fasteners can be easily confused. If the wrong fasteners are used, parts can later break or fall off. You could be hurt.

If doing some of your own service work, use the proper service manual. It tells you much more about how to service the vehicle than this manual can. To order the proper service manual, see Service Publications Ordering Information on page 8‑16. This vehicle has an airbag system. Before attempting to do your own service work, see Servicing Your Airbag-Equipped Vehicle on page 2‑66.

6-5

Keep a record with all parts receipts and list the mileage and the date of any service work performed. See Maintenance Record on page 7‑13. Adding Equipment to the Outside of the Vehicle Things added to the outside of the vehicle can affect the airflow around it. This can cause wind noise and can affect fuel economy and windshield washer performance. Check with your dealer/retailer before adding equipment to the outside of the vehicle. Fuel Use of the recommended fuel is an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend the use of gasoline advertised as TOP TIER Detergent Gasoline. Look for the TOP TIER label on the fuel pump to ensure gasoline meets enhanced detergency standards developed by auto companies. A list of marketers providing TOP TIER Detergent Gasoline can be found at www.toptiergas.com.

6-6

The 8th digit of the Vehicle Identification Number (VIN) shows the code letter or number that identifies the vehicle's engine. The VIN is at the top left of the instrument panel. See Vehicle Identification Number (VIN) on page 6‑116.

Gasoline Octane If the vehicle has the 3.6L V6 engine (VIN Code V), use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service. If the vehicle has the 4.6L V8 engine (VIN Code A), use premium unleaded gasoline with a posted octane rating of 91 or higher. You can also use regular unleaded gasoline rated at 87 octane or higher, but the vehicle's acceleration could be slightly reduced, and a slight audible knocking noise, commonly referred to as spark knock, might be heard. If the octane is less than 87, you might notice a heavy knocking noise when you drive. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, you could damage the engine. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

Gasoline Specifications At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB‐3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). We recommend against the use of gasolines containing MMT. See Additives on page 6‑8 for additional information. California Fuel If the vehicle is certified to meet California Emissions Standards, it is designed to operate on fuels that meet California specifications. See the underhood emission control label. If this fuel is not available in states adopting California emissions standards, the vehicle will operate satisfactorily on fuels meeting federal specifications, but emission control system performance might be affected. The malfunction indicator lamp could turn on and the vehicle might fail a smog‐check test. See Malfunction Indicator Lamp on page 4‑62 . If this occurs, return to your authorized dealer/retailer for diagnosis. If it is determined that the condition is caused by the type of fuel used, repairs might not be covered by the vehicle warranty.

6-7

Additives To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control system to work properly. In most cases, nothing should have to be added to the fuel. However, some gasolines contain only the minimum amount of additive required to meet U.S. Environmental Protection Agency regulations. To help keep fuel injectors and intake valves clean, or if the vehicle experiences problems due to dirty injectors or valves, look for gasoline that is advertised as TOP TIER Detergent Gasoline. For customers who do not use TOP TIER Detergent Gasoline regularly, one bottle of GM Fuel System Treatment PLUS, added to the fuel tank at every engine oil change, can help clean deposits from fuel injectors and intake valves. GM Fuel System Treatment PLUS is the only gasoline additive recommended by General Motors. Also, your dealer/retailer has additives that will help correct and prevent most deposit‐related problems. Gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines might be available in your area. We recommend that you use these gasolines, if they comply with the specifications described earlier. However, E85 (85% ethanol) and

6-8

other fuels containing more than 10% ethanol must not be used in vehicles that were not designed for those fuels. Notice: This vehicle was not designed for fuel that contains methanol. Do not use fuel containing methanol. It can corrode metal parts in the fuel system and also damage plastic and rubber parts. That damage would not be covered under the vehicle warranty. Some gasolines that are not reformulated for low emissions can contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT); ask the attendant where you buy gasoline whether the fuel contains MMT. We recommend against the use of such gasolines. Fuels containing MMT can reduce the life of spark plugs and the performance of the emission control system could be affected. The malfunction indicator lamp might turn on. If this occurs, return to your dealer/retailer for service. Fuels in Foreign Countries If you plan on driving in another country outside the United States or Canada, the proper fuel might be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel would not be covered by the vehicle warranty.

To check the fuel availability, ask an auto club, or contact a major oil company that does business in the country where you will be driving. Filling the Tank

{ WARNING:

Fuel vapor burns violently and a fuel fire can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island. Turn off the engine when refueling. Do not smoke near fuel or when refueling the vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling the vehicle. This is against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel pump; never let children pump fuel.

The tethered fuel cap is located behind a hinged fuel door on the passenger side of the vehicle.

To open the fuel door, push the rearward center edge in and release and it will open. To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring in it; if the cap is released too soon, it will spring back to the right.

6-9

When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See Malfunction Indicator Lamp on page 4‑62. The CHECK GAS CAP message will appear on the Driver Information Center (DIC) display if the fuel cap is not reinstalled properly. See DIC Warnings and Messages on page 4‑76 for more information.

While refueling, hang the tethered fuel cap from the hook on the fuel door.

{ WARNING:

Fuel can spray out on you if you open the fuel cap too quickly. If you spill fuel and then something ignites it, you could be badly burned. This spray can happen if the tank is nearly full, and is more likely in hot weather. Open the fuel cap slowly and wait for any hiss noise to stop. Then unscrew the cap all the way.

Be careful not to spill fuel. Do not top off or overfill the tank, and wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Washing Your Vehicle on page 6‑111.

6-10

{ WARNING:

If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.

Notice: If you need a new fuel cap, be sure to get the right type. Your dealer/retailer can get one for you. If you get the wrong type, it may not fit properly. This may cause the malfunction indicator lamp to light and may damage the fuel tank and emissions system. See Malfunction Indicator Lamp on page 4‑62.

Filling a Portable Fuel Container

{ WARNING:

Never fill a portable fuel container while it is in the vehicle. Static electricity discharge from the container can ignite the fuel vapor. You can be badly burned and the vehicle damaged if this occurs. To help avoid injury to you and others: . Dispense fuel only into approved containers. . Do not fill a container while it is inside a

vehicle, in a vehicle's trunk, pickup bed, or on any surface other than the ground.

. Bring the fill nozzle in contact with the inside

of the fill opening before operating the nozzle. Contact should be maintained until the filling is complete.

. Do not smoke while pumping fuel. . Do not use a cellular phone while

pumping fuel.

6-11

1. Pull the hood release lever with this symbol on it. It is located inside the vehicle on the lower left side of the instrument panel.

Checking Things Under the Hood

Hood Release To open the hood:

{ WARNING:

An electric fan under the hood can start up and injure you even when the engine is not running. Keep hands, clothing, and tools away from any underhood electric fan.

{ WARNING:

Things that burn can get on hot engine parts and start a fire. These include liquids like fuel, oil, coolant, brake fluid, windshield washer and other fluids, and plastic or rubber. You or others could be burned. Be careful not to drop or spill things that will burn onto a hot engine.

6-12

2. Then go to the front of the vehicle and find the

secondary hood release lever. The lever is located under the front edge of the grille near the center. Push the release lever up and raise the hood.

Before closing the hood, be sure all the filler caps are on properly. Then pull the hood down and close it firmly.

Engine Compartment Overview Your vehicle may be equipped with front compartment underhood sight shields, which surround the vehicle's engine cover. These sight shields will need to be removed in order to access some of the underhood components in your vehicle. To remove the sight shields, turn the fasteners on each shield to the left until they pop out. Then remove the fasteners and lift the shields up and away from the tower to tower brace.

6-13

3.6L V6 Engine

6-14

After you have removed the sight shields (if equipped) on the 3.6L V6 engine, here is what you will see:

A. Underhood Fuse Block. See Underhood Fuse

Block on page 6‑118.

H. Engine Oil Dipstick (Out of View). See “Checking

Engine Oil” under Engine Oil on page 6‑18.

B. Remote Negative (-) Terminal. See Jump Starting

I. Brake Master Cylinder Reservoir. See “Brake

on page 6‑40 .

Fluid” under Brakes on page 6‑37.

C. Remote Positive (+) Terminal. See Jump Starting

J. Engine Coolant Surge Tank and Pressure Cap.

on page 6‑40 .

D. Battery. See Battery on page 6‑40. E. Passenger Compartment Air Filter. See Passenger

Compartment Air Filter on page 4‑50.

F. Power Steering Fluid Reservoir. See Power

Steering Fluid on page 6‑35.

G. Engine Oil Fill Cap. See “When to Add Engine Oil”

under Engine Oil on page 6‑18.

See Cooling System on page 6‑26.

K. Engine Air Cleaner/Filter. See Engine Air Cleaner/

Filter on page 6‑23.

L. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” under Windshield Washer Fluid on page 6‑36 .

6-15

4.6L V8 Engine

6-16

After you have removed the sight shields (if equipped) on the 4.6L V8 engine, here is what you will see:

A. Remote Negative (-) Terminal. See Jump Starting

I. Engine Coolant Surge Tank and Pressure Cap.

on page 6‑40 .

See Cooling System on page 6‑26.

B. Remote Positive (+) Terminal. See Jump Starting

J. Engine Air Cleaner/Filter. See Engine Air Cleaner/

on page 6‑40 .

Filter on page 6‑23.

C. Battery. See Battery on page 6‑40. D. Passenger Compartment Air Filter. See Passenger

Compartment Air Filter on page 4‑50.

E. Power Steering Fluid Reservoir. See Power

Steering Fluid on page 6‑35.

F. Engine Oil Fill Cap. See “When to Add Engine Oil”

under Engine Oil on page 6‑18.

G. Engine Oil Dipstick (Out of View). See “Checking

Engine Oil” under Engine Oil on page 6‑18.

H. Brake Master Cylinder Reservoir. See “Brake

Fluid” under Brakes on page 6‑37.

K. Underhood Fuse Block. See Underhood Fuse

Block on page 6‑118.

L. Windshield Washer Fluid Reservoir. See “Adding Washer Fluid” under Windshield Washer Fluid on page 6‑36 .

If your vehicle is equipped with front compartment underhood sight shields, before closing the hood be sure to reinstall the sight shields. To reinstall the shields, locate the tabs on the left and right sides and insert them into the openings in the tower to tower brace. Then insert the fasteners into the top of the shield and push the fasteners back into place.

6-17

Engine Oil Checking Engine Oil It is a good idea to check the engine oil level at each fuel fill. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground. The engine oil dipstick handle is a yellow loop. See Engine Compartment Overview on page 6‑13 for the location of the engine oil dipstick.

1. Turn off the engine and give the oil several minutes to drain back into the oil pan. If this is not done, the oil dipstick might not show the actual level.

2. Pull out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.

When to Add Engine Oil

V6 Engine

V8 Engine

6-18

If the oil is below the cross-hatched area at the tip of the dipstick, add at least one quart/liter of the recommended oil. This section explains what kind of oil to use. For engine oil crankcase capacity, see Capacities and Specifications on page 6‑130. Notice: Do not add too much oil. If the engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, the engine could be damaged.

See Engine Compartment Overview on page 6‑13
for the location of the engine oil fill cap.

Add enough oil to put the level somewhere in the proper operating range. Push the dipstick all the way back in when through.

6-19

What Kind of Engine Oil to Use Look for three things:

. GM4718M

This vehicle's engine requires a special oil meeting GM Standard GM4718M. Oils meeting this standard may be identified as synthetic. However, not all synthetic oils will meet this GM standard. Use only an oil that meets GM Standard GM4718M.

Notice: Using oils that do not have the GM4718M Standard designation can cause engine damage not covered by the vehicle warranty.

. SAE 5W-30

SAE 5W-30 is best for the vehicle. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils such as SAE 20W-50.

. American Petroleum Institute (API) starburst

symbol

Oils meeting these requirements should have the starburst symbol on the container. This symbol indicates that the oil has been certified by the American Petroleum Institute (API).

This vehicle's engine was filled at the factory with a Mobil 1® synthetic oil meeting all requirements for this vehicle. Substitute Engine Oil: When adding oil to maintain engine oil level, oil meeting GM Standard GM4718M might not be available. You can add substitute oil designated SAE 5W-30 with the starburst symbol at all temperatures. Substitute oil not meeting GM Standard GM4718M should not be used for an oil change.

6-20

Engine Oil Additives / Engine Oil Flushes Do not add anything to the oil. The recommended oils with the starburst symbol that meet GM standards are all that is needed for good performance and engine protection. Engine oil system flushes are not recommended and could cause engine damage not covered by the vehicle warranty. Engine Oil Life System When to Change Engine Oil This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on engine revolutions and engine temperature, and not on mileage. Based on driving conditions, the mileage at which an oil change is indicated can vary considerably. For the oil life system to work properly, the system must be reset every time the oil is changed.

Notice: If your vehicle is an STS‐V model, the engine uses a special oil filter. The use of any other engine oil filter could lead to filter failure and result in severe engine damage. Damage caused by use of the wrong engine oil filter would not be covered by your new vehicle warranty. When the system has calculated that oil life has been diminished, it indicates that an oil change is necessary. A CHANGE ENGINE OIL SOON message in the DIC comes on. See DIC Warnings and Messages on page 4‑76 . Change the oil as soon as possible within the next 600 miles (1 000 km). It is possible that, if driving under the best conditions, the oil life system might not indicate that an oil change is necessary for over a year. However, the engine oil and filter must be changed at least once a year and at this time the system must be reset. Your dealer/retailer has trained service people who will perform this work using genuine parts and reset the system. It is also important to check the oil regularly and keep it at the proper level. If the system is ever reset accidentally, the oil must be changed at 3,000 miles (5 000 km) since the last oil change. Remember to reset the oil life system whenever the oil is changed.

6-21

What to Do with Used Oil Used engine oil contains certain elements that can be unhealthy for your skin and could even cause cancer. Do not let used oil stay on your skin for very long. Clean your skin and nails with soap and water, or a good hand cleaner. Wash or properly dispose of clothing or rags containing used engine oil. See the manufacturer's warnings about the use and disposal of oil products. Used oil can be a threat to the environment. If you change your own oil, be sure to drain all the oil from the filter before disposal. Never dispose of oil by putting it in the trash, pouring it on the ground, into sewers, or into streams or bodies of water. Recycle it by taking it to a place that collects used oil.

How to Reset the Engine Oil Life System The Engine Oil Life System calculates when to change the engine oil and filter based on vehicle use. Whenever the oil is changed, reset the system so it can calculate when the next oil change is required. If a situation occurs where the oil is changed prior to a CHANGE ENGINE OIL SOON message in the DIC being turned on, reset the system. After the oil has been changed, the CHANGE ENGINE OIL SOON message must be reset. To reset the message:

1. Press the up or down arrow to scroll the DIC to

show OIL LIFE.

2. Once the XXX% ENGINE OIL LIFE menu item is

highlighted, press and hold the RESET button until the percentage shows 100%. If the percentage does not return to 100% or if the CHANGE ENGINE OIL SOON message comes back on when the vehicle is started, the engine oil life system has not reset. Repeat the procedure.

6-22

Engine Air Cleaner/Filter

4.6L V8 Engine shown, 3.6L V6 Engine similar

The engine air cleaner/filter is in the engine compartment on the driver's side of the vehicle, near the front. See Engine Compartment Overview on page 6‑13 for more information on locating the air cleaner/filter. When to Inspect the Engine Air Cleaner/Filter Inspect the air cleaner/filter at the Maintenance II intervals and replace it at the first oil change after each 80 000 km (50,000 mile) interval. See Scheduled Maintenance on page 7‑3 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change.

6-23

How to Inspect the Engine Air Cleaner/Filter To inspect the air cleaner/filter remove the filter from the vehicle and lightly shake the filter to release loose dust and dirt. If the filter remains caked with dirt, a new filter is required. To inspect or replace the filter in the 3.6L V6 or 4.6L V8 engines, do the following:

1. Remove the two screws located on the top of the

cover.

2. Disconnect the coolant recovery hose so that it

is not going across the top of the engine air cleaner/filter.

3. Loosen the clamp and remove the duct from the passenger's side of the engine air cleaner/filter.

4. The two sides of the airbox are hinged at the

bottom. Open the airbox by pushing the top of the airbox cover toward the engine.

5. Remove the air filter by lifting it straight up through

6.

the opening in the airbox. Inspect or replace the engine air cleaner/filter. See Maintenance Replacement Parts on page 7‑11 for the correct part number for the filter.

7. Reinstall the cover by reversing Steps 1 through 4.

6-24

{ WARNING:

Operating the engine with the air cleaner/filter off can cause you or others to be burned. The air cleaner not only cleans the air; it helps to stop flames if the engine backfires. Use caution when working on the engine and do not drive with the air cleaner/filter off.

Notice: If the air cleaner/filter is off, dirt can easily get into the engine, which could damage it. Always have the air cleaner/filter in place when you are driving.

Automatic Transmission Fluid How to Check Automatic Transmission Fluid It is not necessary to check the transmission fluid level. A transmission fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle to the dealer/ retailer service department and have it repaired as soon as possible. There is a special procedure for checking and changing the transmission fluid. Because this procedure is difficult, it should be done at the dealer/retailer service department. Contact your dealer/retailer for additional information or the procedure can be found in the service manual. To purchase a service manual, see Service Publications Ordering Information on page 8‑16. Notice: Use of the incorrect automatic transmission fluid may damage the vehicle, and the damages may not be covered by the vehicle's warranty. Always use the automatic transmission fluid listed in Recommended Fluids and Lubricants on page 7‑9. Change the fluid and filter at the intervals listed in Scheduled Maintenance on page 7‑3 , and be sure to use the fluid listed in Recommended Fluids and Lubricants on page 7‑9.

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Cooling System The cooling system allows the engine to maintain the correct working temperature.

{ WARNING:

An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

3.6L V6 Engine shown, 4.6L V8 Engine similar

A. Electric Engine Cooling Fan(s) (Out of view) B. Mechanical Engine Cooling Fan (If equipped)

(Out of view)

C. Coolant Surge Tank and Pressure Cap

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Engine Coolant The cooling system in the vehicle is filled with DEX-COOL® engine coolant. This coolant is designed to remain in the vehicle for five years or 240 000 km (150,000 miles), whichever occurs first. The following explains the cooling system and how to check and add coolant when it is low. If there is a problem with engine overheating, see Engine Overheating on page 6‑32

{ WARNING:

Heater and radiator hoses, and other engine parts, can be very hot. Do not touch them. If you do, you can be burned. Do not run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

Notice: Using coolant other than DEX-COOL® can cause premature engine, heater core, or radiator corrosion. In addition, the engine coolant could require changing sooner, at 50 000 km (30,000 miles) or 24 months, whichever occurs first. Any repairs would not be covered by the vehicle warranty. Always use DEX-COOL® (silicate-free) coolant in the vehicle.

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. Protects against rust and corrosion. . Will not damage aluminum parts. . Helps keep the proper engine temperature.

Notice: If an improper coolant mixture is used, the engine could overheat and be badly damaged. The repair cost would not be covered by the vehicle warranty. Too much water in the mixture can freeze and crack the engine, radiator, heater core, and other parts. Notice: If extra inhibitors and/or additives are used in the vehicle's cooling system, the vehicle could be damaged. Use only the proper mixture of the engine coolant listed in this manual for the cooling system. See Recommended Fluids and Lubricants on page 7‑9 for more information.

What to Use

{ WARNING:

Adding only plain water to the cooling system can be dangerous. Plain water, or some other liquid such as alcohol, can boil before the proper coolant mixture will. The vehicle's coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, the engine could get too hot but you would not get the overheat warning. The engine could catch fire and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant.

Use a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant. If using this mixture, nothing else needs to be added. This mixture:

. Gives freezing protection down to −34°F (−37°C),

outside temperature.

. Gives boiling protection up to 265°F (129°C),

engine temperature.

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Checking Coolant The vehicle must be on a level surface when checking the coolant level.

Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. If coolant is visible but the coolant level is not at or above the FULL COLD/FROID line, add a 50/50 mixture of clean, drinkable water and DEX-COOL® coolant at the coolant surge tank, but be sure the cooling system is cool before this is done. When the engine is cold, the coolant level should be at or above the FULL COLD/FROID line on the side of the coolant surge tank. Follow the arrow from the top of the tank down the side to the horizontal mark. If it is not, there could be a leak in the cooling system. If the coolant is low, add the coolant or take the vehicle to a dealer/retailer for service

The coolant surge tank and pressure cap are located on the driver's side of the vehicle, toward the rear of the engine compartment. See Engine Compartment Overview on page 6‑13 for more information on location.

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How to Add Coolant to the Surge Tank

{ WARNING:

An electric engine cooling fan under the hood can start up even when the engine is not running and can cause injury. Keep hands, clothing, and tools away from any underhood electric fan.

If no coolant is visible in the surge tank, add coolant as follows:

1. Remove the coolant surge tank pressure cap when

the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left.

{ WARNING:

You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Do not spill coolant on a hot engine.

{ WARNING:

Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the coolant surge tank pressure cap — even a little — they can come out at high speed. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap.

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2. Then keep turning the pressure cap slowly, and

3. Fill the coolant surge tank with the proper

remove it.

DEX-COOL® coolant mixture, to slightly above the FULL COLD/FROID line on the side of the coolant surge tank.

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4. With the coolant surge tank pressure cap off, start

the engine and let it run until you can feel the upper radiator hose getting hot. The upper radiator hose is the largest of the hoses which comes out of the radiator, on the passenger side of the vehicle. Watch out for the engine cooling fans. By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper mixture to the coolant surge tank until the level reaches the FULL COLD/FROID line on the side of the coolant surge tank.

5. Then replace the pressure cap. Be sure the pressure cap is hand-tight and fully seated.

Start the engine and allow it to warm up. Engine Overheating The vehicle has several indicators to warn of engine overheating. There are two engine hot messages that could be displayed in the Driver Information Center (DIC). See DIC Warnings and Messages on page 4‑76
DIC Warnings and Messages for more information.

If the engine is overheating, then you will find a coolant temperature gage and a coolant warning light on the instrument panel. See Engine Coolant Temperature Gage on page 4‑61 and Engine Coolant Temperature Warning Light on page 4‑61 for more information. You may decide not to lift the hood when this warning appears, but instead get service help right away. See Roadside Service on page 8‑8. If you do decide to lift the hood , make sure the vehicle is parked on a level surface. Then check to see if the engine cooling fans are running. If the engine is overheating, both fans should be running. If they are not, do not continue to run the engine and have the vehicle serviced. Notice: Engine damage from running your engine without coolant is not covered by your warranty. See Overheated Engine Protection Operating Mode on page 6‑34 for information on driving to a safe place in an emergency. Notice: If the engine catches fire while driving with no coolant, the vehicle can be badly damaged. The costly repairs would not be covered by the vehicle warranty. See Overheated Engine Protection Operating Mode on page 6‑34 for information on driving to a safe place in an emergency.

6-32

If Steam Is Coming From The Engine Compartment

{ WARNING:

Steam from an overheated engine can burn you badly, even if you just open the hood. Stay away from the engine if you see or hear steam coming from it. Turn it off and get everyone away from the vehicle until it cools down. Wait until there is no sign of steam or coolant before you open the hood. If you keep driving when the vehicles engine is overheated, the liquids in it can catch fire. You or others could be badly burned. Stop the engine if it overheats, and get out of the vehicle until the engine is cool. See Overheated Engine Protection Operating Mode on page 6‑34 for information on driving to a safe place in an emergency.

If No Steam Is Coming From The Engine Compartment An overheat warning, can indicate a serious problem. If an engine overheat warning is displayed but no steam can be seen or heard, the problem may not be too serious. Sometimes the engine can get a little too hot when the vehicle:

. Climbs a long hill on a hot day. . Stops after high-speed driving. Idles for long periods in traffic. Tows a trailer.

If the overheat warning is displayed with no sign of steam:

1. Turn the air off. 2. Turn the heater on to the highest temperature and

3.

to the highest fan speed. Open the windows as necessary. In heavy traffic, let the engine idle in N (Neutral) while stopped. If it is safe to do so, pull off the road, shift to P (Park) or N (Neutral) and let the engine idle.

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If the engine coolant temperature gage is no longer in the overheat zone or an overheat warning no longer displays, the vehicle can be driven. Continue to drive the vehicle slow for about 10 minutes. Keep a safe vehicle distance from the car in front of you. If the warning does not come back on, continue to drive normally. If the warning continues, pull over, stop, and park the vehicle right away. If there is no sign of steam, idle the engine for three minutes while parked. If the warning is still displayed, turn off the engine until it cools down. Also, see "Overheated Engine Protection Operating Mode" later in this section.

Overheated Engine Protection Operating Mode This operating mode allows your vehicle to be driven to a safe place in an emergency. Should an overheated engine condition exist, an overheat protection mode which alternates firing groups of cylinders helps prevent engine damage. In this mode, you will notice a loss in power and engine performance. An engine overheat warning will indicate that an overheat condition exists. Driving extended miles (km) and/or towing a trailer in the overheat protection mode should be avoided. Notice: After driving in the overheated engine protection operating mode, to avoid engine damage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolant loss and change the oil. See Engine Oil on page 6‑18.

6-34

Power Steering Fluid

See Engine Compartment Overview on page 6‑13
for reservoir location.

When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless you suspect there is a leak in the system or you hear an unusual noise. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.

How to Check Power Steering Fluid To check the power steering fluid, do the following:

1. Turn the ignition off and let the engine

compartment cool down.

2. Wipe the cap and the top of the reservoir clean. 3. Unscrew the cap and wipe the dipstick with a

clean rag.

4. Replace the cap and completely tighten it. 5. Remove the cap again and look at the fluid level

on the dipstick.

The level should be within the HOT mark. If necessary, add only enough fluid to bring the level within the mark. What to Use To determine what kind of fluid to use, see Recommended Fluids and Lubricants on page 7‑9 . Always use the proper fluid. Notice: Use of the incorrect fluid may damage the vehicle and the damages may not be covered by the vehicle's warranty. Always use the correct fluid listed in Recommended Fluids and Lubricants on page 7‑9 .

6-35

Windshield Washer Fluid What to Use When you need windshield washer fluid, be sure to read the manufacturer's instructions before use. If you will be operating your vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. Adding Washer Fluid The CHECK WASHER FLUID message will appear on the Driver Information Center (DIC) when the fluid level is low. See DIC Warnings and Messages on page 4‑76
for more information.

Open the cap with the washer symbol on it. Add washer fluid until the tank is full. See Engine Compartment Overview on page 6‑13 for reservoir location.

Notice:

. When using concentrated washer fluid,

follow the manufacturer's instructions for adding water.

. Do not mix water with ready-to-use washer

fluid. Water can cause the solution to freeze and damage the washer fluid tank and other parts of the washer system. Also, water does not clean as well as washer fluid. Fill the washer fluid tank only three-quarters full when it is very cold. This allows for fluid expansion if freezing occurs, which could damage the tank if it is completely full.

. Do not use engine coolant (antifreeze) in the windshield washer. It can damage the vehicle's windshield washer system and paint.

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Brakes Brake Fluid

The brake master cylinder reservoir is filled with DOT 3 brake fluid. See Engine Compartment Overview on page 6‑13 for reservoir location and access.

There are only two reasons why the brake fluid level in the reservoir might go down:

The brake fluid level goes down because of normal brake lining wear. When new linings are installed, the fluid level goes back up.

. A fluid leak in the brake hydraulic system can also

cause a low fluid level. Have the brake hydraulic system fixed, since a leak means that sooner or later the brakes will not work well.

Do not top off the brake fluid. Adding fluid does not correct a leak. If fluid is added when the linings are worn, there will be too much fluid when new brake linings are installed. Add or remove brake fluid, as necessary, only when work is done on the brake hydraulic system.

{ WARNING:

If too much brake fluid is added, it can spill on the engine and burn, if the engine is hot enough. You or others could be burned, and the vehicle could be damaged. Add brake fluid only when work is done on the brake hydraulic system.

If the ignition is on and the brake fluid is low, the CHECK BRAKE FLUID message displays in the Driver Information Center (DIC). See DIC Warnings and Messages on page 4‑76.

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What to Add DOT 3 brake fluid is recommended. DOT 4 brake fluid is also compatible with the vehicle's brake system parts. However, if DOT 4 fluid is used, it is recommended that the brake hydraulic system be flushed and refilled with new DOT 4 fluid at a regular maintenance service every two years. See Scheduled Maintenance on page 7‑3 . Use new brake fluid from a sealed container only. See Recommended Fluids and Lubricants on page 7‑9. Always clean the brake fluid reservoir cap and the area around the cap before removing it. This helps keep dirt from entering the reservoir.

{ WARNING:

With the wrong kind of fluid in the brake hydraulic system, the brakes might not work well. This could cause a crash. Always use the proper brake fluid.

Notice:

. Using the wrong fluid can badly damage

brake hydraulic system parts. For example, just a few drops of mineral-based oil, such as engine oil, in the brake hydraulic system can damage brake hydraulic system parts so badly that they will have to be replaced. Do not let someone put in the wrong kind of fluid. If brake fluid is spilled on the vehicle's painted surfaces, the paint finish can be damaged. Be careful not to spill brake fluid on the vehicle. If you do, wash it off immediately. See Washing Your Vehicle on page 6‑111. Brake Wear This vehicle has disc brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound can come and go or be heard all the time the vehicle is moving, except when applying the brake pedal firmly.

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{ WARNING:

The brake wear warning sound means that soon the brakes will not work well. That could lead to an accident. When the brake wear warning sound is heard, have the vehicle serviced.

Notice: Continuing to drive with worn-out brake pads could result in costly brake repair. Some driving conditions or climates can cause a brake squeal when the brakes are first applied or lightly applied. This does not mean something is wrong with the brakes. Properly torqued wheel nuts are necessary to help prevent brake pulsation. When tires are rotated, inspect brake pads for wear and evenly tighten wheel nuts in the proper sequence to torque specifications in Capacities and Specifications on page 6‑130. Brake linings should always be replaced as complete axle sets.

Brake Pedal Travel See your dealer/retailer if the brake pedal does not return to normal height, or if there is a rapid increase in pedal travel. This could be a sign that brake service might be required. Brake Adjustment Every time the brakes are applied, with or without the vehicle moving, the brakes adjust for wear. Replacing Brake System Parts The braking system on a vehicle is complex. Its many parts have to be of top quality and work well together if the vehicle is to have really good braking. The vehicle was designed and tested with top-quality brake parts. When parts of the braking system are replaced — for example, when the brake linings wear down and new ones are installed — be sure to get new approved replacement parts. If this is not done, the brakes might not work properly. For example, if someone puts in brake linings that are wrong for the vehicle, the balance between the front and rear brakes can change — for the worse. The braking performance expected can change in many other ways if the wrong replacement brake parts are installed.

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Battery Refer to the replacement number on the original battery label when a new battery is needed. See Engine Compartment Overview on page 6‑13 for battery location.

{ DANGER:

Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Vehicle Storage

{ WARNING:

Batteries have acid that can burn you and gas that can explode. You can be badly hurt if you are not careful. See Jump Starting on page 6‑40 for tips on working around a battery without getting hurt.

6-40

Infrequent Usage: Remove the black, negative (−) cable from the battery to keep the battery from running down. Extended Storage: Remove the black, negative (−) cable from the battery or use a battery trickle charger. Jump Starting If your vehicle's battery has run down, you may want to use another vehicle and some jumper cables to start your vehicle. Be sure to use the following steps to do it safely.

{ WARNING:

Batteries can hurt you. They can be dangerous because:

They contain acid that can burn you. They contain gas that can explode or ignite. They contain enough electricity to burn you. If you do not follow these steps exactly, some or all of these things can hurt you.

Notice: Ignoring these steps could result in costly damage to the vehicle that would not be covered by the warranty. Trying to start the vehicle by pushing or pulling it will not work, and it could damage the vehicle.

1. Check the other vehicle. It must have

a 12-volt battery with a negative ground system.

Notice: If the other vehicle's system is not a 12-volt system with a negative ground, both vehicles can be damaged. Only use vehicles with 12-volt systems with negative grounds to jump start your vehicle.

2. Get the vehicles close enough so the jumper

cables can reach, but be sure the vehicles are not touching each other. If they are, it could cause a ground connection you do not want. You would not be able to start your vehicle and the bad grounding could damage the electrical systems. To avoid the possibility of the vehicles rolling, set the parking brake firmly on both vehicles involved in the jump start procedure. Put an automatic