2012 GMC Canyon Owners Manual

Inspect the air cleaner/filter at the scheduled maintenance intervals and replace it at the first oil change after each 80 000 km (50,000 mi) interval. See Maintenance Schedule on page 11‑3 for more information. If you are driving in dusty/dirty conditions, inspect the filter at each engine oil change. How to Inspect the Engine Air Cleaner/Filter To inspect or replace the engine air cleaner/filter, do the following: 1. Unfasten the clips that hold the cover on and remove the cover.

2. Lift out the engine air cleaner/

3.

filter. Inspect or replace the air filter. See Maintenance Replacement Parts on page 11‑13 to determine which filter to use.

4. Reinstall the engine air cleaner/

filter cover. Fasten the clips to hold the cover in place. { 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.

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

2.9 L L4 Engine Shown (3.7 L L5 Engine Similar)

A. Coolant Recovery Tank B. Engine Cooling Fan

(Out of View)

C. Radiator Pressure Cap

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Vehicle Care

10-19

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 5 years or 240 000 km (150,000 mi), 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 10‑23.

{ 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 mi) 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.

5.3 L V8 Engine

A. Coolant Recovery Tank B. Radiator Pressure Cap C. Engine Cooling Fan (Out

of View)

{ 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.

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10-20

Vehicle Care

What to Use

{ WARNING

Adding only plain water or some other liquid to the cooling system can be dangerous. Plain water and other liquids, can boil before the proper coolant mixture will. The 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.

Notice: If extra inhibitors and/or additives are used in the vehicle 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 11‑11 for more information. Never dispose of engine coolant by putting it in the trash, pouring it on the ground, or into sewers, streams, or bodies of water. Have the coolant changed by an authorized service center, familiar with legal requirements regarding used coolant disposal. This will help protect the environment and your health.

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 −37°C (−34°F), outside temperature.

. Gives boiling protection up to

129°C (265°F), engine temperature.

. 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.

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

The coolant recovery tank cap has this symbol on it. It is located toward the rear of the engine compartment on the passenger side of the vehicle. See Engine Compartment Overview on page 10‑6 for more information on location.

Check to see if coolant is visible in the coolant recovery tank. If the coolant inside the coolant recovery 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 mark, add a 50/50 mixture of clean, drinkable water and DEX-COOL coolant at the coolant recovery tank, but be sure the cooling system is cool before this is done. The vehicle must be on a level surface. When the engine is cold, the coolant level should be at FULL COLD, or a little higher. When the engine is warm, the level could be above the FULL COLD level. When the engine is cold, the coolant level should be at least up to the FULL COLD mark. If it is not, there could be a leak in the cooling system.

Vehicle Care

10-21

How to Add Coolant to the Recovery Tank

{ 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.

Notice: This vehicle has a specific coolant fill procedure. Failure to follow this procedure could cause the engine to overheat and be severely damaged. When the coolant in the coolant recovery tank is at the FULL COLD mark, start the vehicle. If coolant is needed, add the proper DEX-COOL coolant mixture at the coolant recovery tank.

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10-22

Vehicle Care

How to Add Coolant to the Radiator

{ 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.

{ 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 surge tank pressure cap — even a little — they can come out at high speed. Never turn the cap when the cooling system, including the surge tank pressure cap, is hot. Wait for the

(Continued)

WARNING (Continued)

cooling system and surge tank pressure cap to cool if you ever have to turn the pressure cap.

If coolant is needed, add the proper mixture directly to the radiator, but be sure the cooling system is cool before this is done.

2. Keep turning the cap to

remove it.

3. Fill the radiator with the proper DEX‐COOL coolant mixture, up to the base of the filler neck. See Engine Coolant on page 10‑19 for more information about the proper coolant mixture.

1. Remove the radiator pressure cap when the cooling system, including the upper radiator hose, is no longer hot. Turn the pressure cap slowly counterclockwise about one full turn. If a hiss is heard, wait for that to stop. A hiss means there is still some pressure left.

4. Fill the coolant recovery tank to

the FULL COLD mark.

5. Reinstall the cap on the coolant

recovery tank, but leave the radiator pressure cap off.

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At any time during this procedure if coolant begins to flow out of the filler neck, reinstall the pressure cap. Notice: If the pressure cap is not tightly installed, coolant loss and possible engine damage may occur. Be sure the cap is properly and tightly secured.

Engine Overheating The vehicle has a coolant temperature gauge displayed on the instrument panel to warn if the engine is overheating. See Engine Coolant Temperature Gauge on page 5‑9. If the engine is too hot, the air conditioning might stop working. This is normal and helps cool the engine. If the decision is made not to lift the hood when the warning appears, but instead get service help right away. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside Assistance Program (Mexico) on page 13‑9.

Vehicle Care

10-23

If the decision is made to lift the hood, make sure the vehicle is parked on a level surface. Then check to see if the engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, do not continue to run the engine and have the vehicle serviced. The engine cooling fan speed should increase when idle speed is doubled by pushing the accelerator pedal down. If it does not, the vehicle needs service. Turn off the engine. Notice: Engine damage from running the engine without coolant is not covered by the warranty. Notice: If the engine catches fire because of being driven with no coolant, the vehicle can be badly damaged. The costly repairs would not be covered by the vehicle warranty.

6. Start the engine and let it run

until the upper radiator hose can be felt getting hot. Watch out for the engine cooling fan.

7. By this time, the coolant level inside the radiator filler neck might be lower. If the level is lower, add more of the proper DEX‐COOL coolant mixture through the filler neck until the level reaches the base of the filler neck.

8. Replace the pressure cap.

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10-24

Vehicle Care

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. Just 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 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.

If No Steam is Coming from the Engine Compartment 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. See “Driving on Grades” under Trailer Towing on page 9‑57.

If the overheat warning is displayed with no sign of steam: 1. Turn the air conditioning off. 2. Turn the heater on to the highest

temperature and to the highest fan speed. Open the windows as necessary.

3.

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.

If the temperature overheat gauge is no longer in the overheat zone or an overheat warning no longer displays, the vehicle can be driven. Continue to drive the vehicle slowly for about 10 minutes. Keep a safe vehicle distance from the vehicle in front. 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.

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Engine Fan This vehicle has a clutched engine cooling fan. When the clutch is engaged, the fan spins faster to provide more air to cool the engine. In most everyday driving conditions, the clutch is not engaged. This improves fuel economy and reduces fan noise. Under heavy vehicle loading, trailer towing and/or high outside temperatures, the fan speed increases when the clutch engages. So you may hear an increase in fan noise. This is normal and should not be mistaken as the transmission slipping or making extra shifts. It is merely the cooling system functioning properly. The fan will slow down when additional cooling is not required and the clutch disengages. This fan noise may also be heard when the engine is started. It will go away as the fan clutch disengages.

Power Steering Fluid

The power steering fluid reservoir is located near the front of the engine compartment, behind the radiator. See Engine Compartment Overview on page 10‑6 for reservoir location. When to Check Power Steering Fluid It is not necessary to regularly check power steering fluid unless there is a leak suspected in the system or an unusual noise is heard. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.

Vehicle Care

10-25

How to Check Power Steering Fluid 1. Turn the key 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. Then remove the cap again and

look at the fluid level on the dipstick.

The level should be between the ADD and FULL marks. If necessary, add only enough fluid to bring the level up to the proper range.

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10-26

Vehicle Care

What to Use To determine what kind of fluid to use, see Recommended Fluids and Lubricants on page 11‑11. 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 11‑11.

Washer Fluid

What to Use When windshield washer fluid is needed, be sure to read the manufacturer's instructions before use. If operating the vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing.

Adding Washer Fluid

Open the cap with the washer symbol on it. Add washer fluid until the tank is full. See Engine Compartment Overview on page 10‑6 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 windshield washer system and paint.

Brakes This vehicle has front disc brakes and rear drum 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 a crash. 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 12‑2.

Rear drum brakes do not have wear indicators, but if a rear brake rubbing noise is heard, have the rear brake linings inspected immediately. Rear brake drums should be removed and inspected each time the tires are removed for rotation or changing. Drum brakes have an inspection hole to inspect lining wear during scheduled maintenance. When the front brake pads are replaced, have the rear brakes inspected, too. Brake linings should always be replaced as complete axle sets. Brake Pedal Travel See your dealer 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.

Vehicle Care

10-27

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, be sure to get new, approved replacement parts. If this is not done, the brakes might not work properly. For example, installing disc brake pads that are wrong for the vehicle, can change the balance between the front and rear brakes — 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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10-28

Vehicle Care

Brake Fluid

The brake master cylinder reservoir is filled with DOT 3 brake fluid. See Engine Compartment Overview on page 10‑6 for the location of the reservoir. 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. See “Checking Brake Fluid” in this section.

Refer to the Maintenance Schedule to determine when to check the brake fluid. See Maintenance Schedule on page 11‑3.

Checking Brake Fluid Check brake fluid by looking at the brake fluid reservoir. See Engine Compartment Overview on page 10‑6.

The fluid level should be above the PP mark. If it is not, have the brake hydraulic system checked to see if there is a leak. After work is done on the brake hydraulic system, make sure the level is above the PP mark but not over the MAX mark.

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What to Add Use only new DOT 3 brake fluid from a sealed container. See Recommended Fluids and Lubricants on page 11‑11. 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.

Battery Refer to the replacement number shown on the original battery label when a new battery is needed. See Engine Compartment Overview on page 10‑6 for battery location.

{ WARNING

Battery posts, terminals, and related accessories contain lead and lead compounds, chemicals

(Continued)

Vehicle Care

10-29

WARNING (Continued)

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 10‑81 for tips on working around a battery without getting hurt.

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.

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10-30

Vehicle Care

Four-Wheel Drive

Transfer Case

When to Check Lubricant Refer to the Maintenance Schedule to determine how often to check the lubricant. See Maintenance Schedule on page 11‑3.

How to Check Lubricant To get an accurate reading, the vehicle should be on a level surface.

Front Axle

When to Check and Change Lubricant It is not necessary to regularly check the front axle fluid unless there is a leak suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired. How to Check Lubricant

To get an accurate reading, the vehicle should be on a level surface.

A. Drain Plug B. Fill Plug If the level is below the bottom of the fill plug hole, located on the transfer case, some lubricant will need to be added. Remove the plug and add enough lubricant to raise the level to the bottom of the fill plug hole. Use care not to overtighten the plug. What to Use See Recommended Fluids and Lubricants on page 11‑11.

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If the level is below the bottom of the filler plug hole, located on the front axle, some lubricant may need to be added. When the differential is cold, add enough lubricant to raise the level to 12 mm (1/2 in) below the fill plug hole. When the differential is at operating temperature (warm), add enough lubricant to raise the level to the bottom of the fill plug hole. What to Use See Recommended Fluids and Lubricants on page 11‑11.

Rear Axle

When to Check and Change Lubricant It is not necessary to regularly check rear axle fluid unless there is a leak suspected or an unusual noise is heard. A fluid loss could indicate a problem. Have it inspected and repaired.

How to Check Lubricant

Starter Switch Check

Vehicle Care

10-31

{ WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.

1. Before starting this check, be

sure there is enough room around the vehicle.

2. Firmly apply both the parking brake and the regular brake. See Parking Brake on page 9‑41. Do not use the accelerator pedal, and be ready to turn off the engine immediately if it starts.

3. Try to start the engine in each gear. The vehicle should start only in P (Park) or N (Neutral).

To get an accurate reading, the vehicle should be on a level surface. The proper level is from 0 mm to 10 mm (0 to 3/8 in) below the bottom of the fill plug hole, located on the rear axle. What to Use See Recommended Fluids and Lubricants on page 11‑11 to determine which kind of lubricant to use.

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10-32

Vehicle Care

If the vehicle starts in any other position, contact your dealer for service.

Automatic Transmission Shift Lock Control Function Check

{ WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured.

1. Before starting this check, be

sure there is enough room around the vehicle. It should be parked on a level surface.

2. Firmly apply the parking brake.

See Parking Brake on page 9‑41. Be ready to apply the regular brake immediately if the vehicle begins to move.

3. With the engine off, turn the

ignition on, but do not start the engine. Without applying the regular brake, try to move the shift lever out of P (Park) with normal effort. If the shift lever moves out of P (Park), contact your dealer for service.

Ignition Transmission Lock Check While parked, and with the parking brake set, try to turn the ignition to LOCK/OFF in each shift lever position.

The ignition should turn to LOCK/OFF only when the shift lever is in P (Park). The ignition key should come out only in LOCK/OFF.

Contact your dealer if service is required.

Park Brake and P (Park) Mechanism Check { WARNING

When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it begins to roll. Be ready to apply the regular brake at once should the vehicle begin to move.

Park on a fairly steep hill, with the vehicle facing downhill. Keeping your foot on the regular brake, set the parking brake.

To check the parking brake's holding ability: With the engine running and the transmission in N (Neutral), slowly remove foot pressure from the regular brake pedal. Do this until the vehicle is held by the parking brake only.

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Allowing the wiper blade arm to touch the windshield when no wiper blade is installed could damage the windshield. Any damage that occurs would not be covered by the vehicle warranty. Do not allow the wiper blade arm to touch the windshield. 1. To remove the old wiper blades,

lift the wiper arm until it locks into a vertical position.

Vehicle Care

10-33

D. Blade Pivot E. Hook Slot F. Arm Hook

2. Press down on the blade

assembly pivot locking tab. Pull down on the blade assembly to release it from the wiper arm hook.

3. Remove the insert from the

blade assembly. The insert has two notches at one end that are locked by bottom claws of the blade assembly. At the notched end, pull the insert from the blade assembly.

To check the P (Park) mechanism's holding ability: With the engine running, shift to P (Park). Then release the parking brake followed by the regular brake.

Contact your dealer if service is required.

Wiper Blade Replacement Windshield wiper blades should be inspected for wear and cracking. See Maintenance Schedule on page 11‑3 for more information. Replacement blades come in different types and are removed in different ways. For proper type and length, see Maintenance Replacement Parts on page 11‑13.

A. Blade Assembly B. Arm Assembly C. Locking Tab

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10-34

Vehicle Care

Headlamp Aiming Headlamp aim has been preset at the factory and should need no further adjustment. However, if the vehicle is damaged in a crash, the headlamp aim may be affected. Aim adjustment to the low-beam headlamps may be necessary if oncoming drivers flash their high-beam headlamps at you (for vertical aim). If the headlamps need to be re-aimed, it is recommended that the vehicle be taken to the dealer for service.

4. To install the new wiper insert,

slide the insert (D), notched end last, into the end with two blade claws (A). Slide the insert all the way through the blade claws at the opposite end (B). The plastic caps (C) will be forced off as the insert is fully inserted.

5. Be sure that the notches are locked by the bottom claws. Make sure that all other claws are properly locked on both sides of the insert slots.

A. Claw in Notch B. Correct Installation C.

Incorrect Installation

6. Put the blade assembly pivot in the wiper arm hook. Pull up until the pivot locking tab locks in the hook slot.

7. Carefully lower the wiper arm and blade assembly onto the windshield.

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Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑37. For any bulb‐changing procedure not listed in this section, contact your dealer.

Halogen Bulbs

{ WARNING

Halogen bulbs have pressurized gas inside and can burst if you drop or scratch the bulb. You or others could be injured. Be sure to read and follow the instructions on the bulb package.

Headlamps

Vehicle Care

10-35

A. Low-Beam Headlamp/Daytime

Running Lamps (DRL) B. High-Beam Headlamp To replace one of these bulbs: 1. Open the hood. See Hood on

page 10‑5.

2. Reach in and access the bulb sockets from inside the engine compartment.

3. Turn the bulb socket

counterclockwise to remove it from the headlamp assembly and pull it straight out.

4. Unplug the electrical connector

from the old bulb by releasing the clips on the bulb socket. 5. Pull the old bulb straight out. 6. Push the new bulb straight in

until it clicks to secure it.

7. Plug in the electrical connector

to the new bulb socket.

8. Push the bulb socket straight in and turn it clockwise to secure it in the headlamp assembly.

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10-36

Vehicle Care

Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps

A. Stoplamp/Taillamp B. Turn Signal/Taillamp C. Back‐up Lamp To replace one of these bulbs: 1. Open the tailgate. See Tailgate

on page 2‑7.

2. Remove the two rear lamp assembly screws near the tailgate latch.

3. Pull the lamp assembly away

from the vehicle.

4. Turn the bulb socket

counterclockwise to remove it from the taillamp assembly.

5. Holding the socket, pull the old

bulb straight out to release it from the socket.

6. Push the new bulb straight into

the socket until it clicks.

7.

Insert the bulb socket into the taillamp assembly and turn it clockwise to secure.

8. Reinstall the taillamp assembly

and tighten the screws.

Center High-Mounted Stoplamp (CHMSL) To replace the CHMSL bulb: 1. Remove the two screws and lift off the lamp assembly from the vehicle.

2. Turn the bulb socket

counterclockwise and remove it from the lamp assembly.

3. Holding the socket, pull the bulb

to release it from the socket.

4. Push the new bulb into the

socket until it clicks.

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5.

Insert the bulb socket into the lamp assembly and turn it clockwise to secure.

6. Reinstall the lamp assembly and

tighten the screws.

License Plate Lamp To replace one of these bulbs:

1. Reach under the rear bumper for

the bulb socket.

2. Turn the bulb socket

counterclockwise and pull the bulb socket out of the connector.

3. Pull the old bulb straight out

from the bulb socket.

4. Push the new bulb straight in

until it clicks to secure it.

5. Reach under the rear bumper to reinstall the bulb socket into the connector.

6. Turn the bulb socket clockwise

to secure it to the connector.

Replacement Bulbs

Exterior Lamp

Cargo Lamp and Center High‐Mounted Stoplamp (CHMSL) License Plate Bulb Headlamps

Bulb

Number

912LL

W5W LL

High-beam

9005

Vehicle Care

10-37

Exterior Lamp

Low-beam/ Daytime Running Lamp (DRL)

Parking/Front Turn Signal Parking Lamp (Inboard) Stoplamp, Rear Turn Signal, Taillamp, and Back‐up Lamp

Bulb

Number

9006

3757KA

3157A

3057

For replacement bulbs not listed here, contact your dealer.

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10-38

Vehicle Care

Electrical System

Electrical System Overload The vehicle has fuses and circuit breakers to protect against an electrical system overload. When the current electrical load is too heavy, the circuit breaker opens and closes, protecting the circuit until the current load returns to normal or the problem is fixed. This greatly reduces the chance of circuit overload and fire caused by electrical problems. Fuses and circuit breakers protect power devices in the vehicle. Replace a bad fuse with a new one of the identical size and rating. If there is a problem on the road and a fuse needs to be replaced, the same amperage fuse can be borrowed. Choose some feature of the vehicle that is not needed to use and replace it as soon as possible.

Headlamp Wiring An electrical overload may cause the lamps to go on and off, or in some cases to remain off. Have the headlamp wiring checked right away if the lamps go on and off or remain off. Windshield Wipers If the wiper motor overheats due to heavy snow or ice, the windshield wipers will stop until the motor cools and will then restart. Although the circuit is protected from electrical overload, overload due to heavy snow or ice may cause wiper linkage damage. Always clear ice and heavy snow from the windshield before using the windshield wipers. If the overload is caused by an electrical problem and not snow or ice, be sure to get it fixed.

Fuses and Circuit Breakers The wiring circuits in the vehicle are protected from short circuits by a combination of fuses and circuit breakers. This greatly reduces the chance of fires caused by electrical problems. Look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure you replace a bad fuse with a new one of the identical size and rating. If you ever have a problem on the road and do not have a spare fuse, you can borrow one that has the same amperage. Just pick some feature of the vehicle that you can get along without — like the radio or cigarette lighter — and use its fuse, if it is the correct amperage. Replace it as soon as you can.

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Vehicle Care

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Engine Compartment Fuse Block

To remove the cover, push in on the tab on the end of the cover and lift. To reinstall the cover, line up the tab and push down on the cover until the tab clicks into place. Notice: Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.

The engine compartment fuse block is located on the driver side of the engine compartment. See Engine Compartment Overview on page 10‑6 for more information on location.

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Vehicle Care

Fuses

Usage

Fuses

Usage

ABS

ABS 1
ABS 2
AUX PWR 1
AUX PWR 2
BCK/UP

BLWR

CLSTR CNSTR VENT

CRUISE

Antilock Brake System (ABS), ABS Module, Four‐Wheel Drive, Gravity Sensor ABS 1 (ABS Logic) ABS 2 (ABS Pump) Accessory Power 1
Accessory Power 2
Back-up Lights Climate Control Fan Cluster Fuel Canister Vent Solenoid Cruise Control Switch, Inside Rearview Mirror, Transfer Case Control Module, Brake Switch, Clutch Disable

DR/LCK

DRL

ERLS

ETC

FOG/LAMP

FRT PRK LAMP

FRT/AXLE

FSCM

Power Door Locks (If Equipped) Daylight Running Lamps Mass Air Flow (MAF) Sensor, Can Purge Solenoid, Air Injector Reactor (AIR) Relay Electronic Throttle Control (ETC) Fog Lamps (If Equipped) Front Park/Turn Lamps, Driver and Passenger Side Power Window Switches Lighting Front Axle Actuator Fuel System Control Module

The trailer brake relay is located on the bottom side of the battery harness.

Fuses

Usage

O2 SNSR

A/C

A/C CMPRSR

Oxygen Sensors, Air Injection Reactor (AIR) Relay Air Conditioning Control Head, Power Seats Air Conditioning Compressor

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Vehicle Care

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Usage

Fuses

Usage

Fuses

PWR/WNDW Power Windows

Fuses BACKUP LAMP HORN

HTD/SEAT

IGN

INJ

LT HDLP

PCM B

PCMI

PWR/SEAT

Backup Lamp

Horn Heated Seat (If Equipped) Ignition, Clutch Starter Switch, Neutral Safety Back‐Up Switch, Ignition Coils 1‐5, Air Conditioning Relay Injectors Driver Side Headlamp Power Control Module (PCM) B Power Control Module (PCM) Power Seat Circuit Breaker (If Equipped)

RDO

REAR PRK LAMP

REAR PRK LAMP2

RT HDLP

RVC

S/ROOF

(If Equipped) Radio Rear Parking Lamp 1, Passenger Side Taillamp, License Plate Lamps Driver Side Rear Taillamp, Passenger Side Airbag Indicator Lighting, Instrument Panel Dimming Power (2WD/4WD switch lighting) Passenger Side Headlamp Regulated Voltage Control Not Used

STOP

STRTR

TBC

TCM

TCCM

TRAILER BRAKE

TRANS

TRN/ HAZRD FRT

TRN/ HAZRD REAR

VSES/STOP

Usage Stop Lamps Starter Solenoid Relay Truck Body Controller Transmission Control Module Transfer Case Control Module

Trailer Brake

Transmission Solenoid Turn/Hazard/ Courtesy/Cargo Lamps/Mirrors

Rear Turn/Hazard Lights

Vehicle Stability Enhancement System/Stop

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Vehicle Care

Fuses

Usage

Relays

WPR

WSW

Wiper Wiper/Washer Switch

Relays

Usage

Air Conditioning Compressor

A/C CMPRSR Backup Lamp Backup Lamp BEAM SEL

DRL

FOG/LAMP

HDLP HORN

IGN 3 HVAC

Beam Selection Daylight Running Lamps Fog Lamps (If Equipped) Headlamps Horn Ignition 3, Climate Control, Climate Control Head Fuse, Power Seat Fuse

PRK/LAMP

PWR/TRN

RAP

RUN/CRNK

Relays

STRTR

VSES

WPR WPR 2

Usage Starter Relay (PCM Relay) Vehicle Stability Enhancement System Wipers (On/Off) Wiper 2 (High/Low)

Miscellaneous

Usage

A/C CLTCH

MEGA FUSE

WPR

Diode — Air Conditioning, Clutch Mega Fuse Diode — Wiper

Usage Front Parking Lamp Fuse, Rear Parking Lamps Powertrain, Electronic Throttle Control Fuse, Oxygen Sensor Fuse Retained Accessory Power (Power Window Fuse, Wiper/Washer Switch Fuse) Run/Crank, Airbag System Fuse, Cruise Control Fuse, Ignition Fuse, Back-Up Lamps, ABS Fuse, Front Axle, PCM-1, Injectors Fuse, Transmission Fuse, ERLS

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Vehicle Care

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2.9L and 3.7L

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Vehicle Care

Fuses

Usage

Trailer Auxiliary Maxi-Fuse

5.3L

Fuses

Usage

Fuses

Trailer Park Lamp Communication Interface Module

Usage Supplemental Inflatable Restraint System, Sensing and Diagnostic Module

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Wheels and Tires

Tires Every new GM vehicle has high-quality tires made by a leading tire manufacturer. See the warranty manual for information regarding the tire warranty and where to get service. For additional information refer to the tire manufacturer.

{ WARNING . Poorly maintained and

improperly used tires are dangerous.

. Overloading the tires can

cause overheating as a result of too much flexing. There could be a blowout and a serious crash. See Vehicle Load Limits on page 9‑16.

(Continued)

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WARNING (Continued)

WARNING (Continued)

. Improperly repaired tires can

cause a crash. Only the dealer or an authorized tire service center should repair, replace, dismount, and mount the tires.

. Do not spin the tires in

excess of 55 km/h (35 mph) on slippery surfaces such as snow, mud, ice, etc. Excessive spinning may cause the tires to explode.

. Underinflated tires pose the same danger as overloaded tires. The resulting crash could cause serious injury. Check all tires frequently to maintain the recommended pressure. Tire pressure should be checked when the tires are cold.

. Overinflated tires are more likely to be cut, punctured, or broken by a sudden impact — such as when hitting a pothole. Keep tires at the recommended pressure.

. Worn or old tires can cause a

crash. If the tread is badly worn, replace them.

. Replace any tires that have been damaged by impacts with potholes, curbs, etc.

(Continued)

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Vehicle Care

Tire Sidewall Labeling Useful information about a tire is molded into its sidewall. The examples show a typical passenger vehicle tire and a compact spare tire sidewall.

Passenger (P‐Metric) Tire Example (A) Tire Size: The tire size is a combination of letters and numbers used to define a particular tire's width, height, aspect ratio, construction type,

and service description. See the “Tire Size” illustration later in this section for more detail. (B) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. GM's TPC specifications meet or exceed all federal safety guidelines. (C) DOT (Department of Transportation): The Department of Transportation (DOT) code indicates that the tire is in compliance with the U.S. Department of Transportation Motor Vehicle Safety Standards. (D) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code are the

Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (E) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (F) Uniform Tire Quality Grading (UTQG): Tire manufacturers are required to grade tires based on three performance factors: treadwear, traction, and temperature resistance. For more information see Uniform Tire Quality Grading on page 10‑61. (G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.

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regular road tire has lost air and gone flat. If the vehicle has a compact spare tire, see Compact Spare Tire on page 10‑80 and If a Tire Goes Flat on page 10‑65. (C) Tire Identification Number (TIN): The letters and numbers following the DOT (Department of Transportation) code are the Tire Identification Number (TIN). The TIN shows the manufacturer and plant code, tire size, and date the tire was manufactured. The TIN is molded onto both sides of the tire, although only one side may have the date of manufacture. (D) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.

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(E) Tire Inflation: The temporary use tire or compact spare tire should be inflated to 420 kPa (60 psi). For more information on tire pressure and inflation see Tire Pressure on page 10‑51. (F) Tire Size: A combination of letters and numbers define a tire's width, height, aspect ratio, construction type, and service description. The letter T as the first character in the tire size means the tire is for temporary use only. (G) TPC Spec (Tire Performance Criteria Specification): Original equipment tires designed to GM's specific tire performance criteria have a TPC specification code molded onto the sidewall. GM's TPC specifications meet or exceed all federal safety guidelines.

Compact Spare Tire Example

(A) Tire Ply Material: The type of cord and number of plies in the sidewall and under the tread. (B) Temporary Use Only: The compact spare tire or temporary use tire has a tread life of approximately 5 000 km (3,000 mi) and should not be driven at speeds over 105 km/h (65 mph). The compact spare tire is for emergency use when a

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Vehicle Care

Tire Designations

Tire Size The following is an example of a typical passenger vehicle tire size.

(A) Passenger (P‐Metric) Tire: The United States version of a metric tire sizing system. The letter P as the first character in the tire size means a passenger vehicle tire engineered to standards set by the U.S. Tire and Rim Association. (B) Tire Width: The three‐digit number indicates the tire section width in millimeters from sidewall to sidewall.

(C) Aspect Ratio: A two‐digit number that indicates the tire height‐to‐width measurements. For example, if the tire size aspect ratio is 60, as shown in item C of the illustration, it would mean that the tire's sidewall is 60 percent as high as it is wide. (D) Construction Code: A letter code is used to indicate the type of ply construction in the tire. The letter R means radial ply construction; the letter D means diagonal or bias ply construction; and the letter B means belted‐bias ply construction. (E) Rim Diameter: Diameter of the wheel in inches. (F) Service Description: These characters represent the load index and speed rating of the tire. The load index represents the load carrying capacity a tire

is certified to carry. The speed rating is the maximum speed a tire is certified to carry a load.

Tire Terminology and Definitions Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory Weight: The combined weight of optional accessories. Some examples of optional accessories are automatic transmission, power steering, power brakes, power windows, power seats, and air conditioning. Aspect Ratio: The relationship of a tire's height to its width.

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Belt: A rubber coated layer of cords that is located between the plies and the tread. Cords may be made from steel or other reinforcing materials. Bead: The tire bead contains steel wires wrapped by steel cords that hold the tire onto the rim. Bias Ply Tire: A pneumatic tire in which the plies are laid at alternate angles less than 90 degrees to the centerline of the tread. Cold Tire Pressure: The amount of air pressure in a tire, measured in kPa (kilopascal) or psi (pounds per square inch) before a tire has built up heat from driving. See Tire Pressure on page 10‑51. Curb Weight: The weight of a motor vehicle with standard and optional equipment including the

maximum capacity of fuel, oil, and coolant, but without passengers and cargo. DOT Markings: A code molded into the sidewall of a tire signifying that the tire is in compliance with the U.S. Department of Transportation (DOT) Motor Vehicle Safety Standards. The DOT code includes the Tire Identification Number (TIN), an alphanumeric designator which can also identify the tire manufacturer, production plant, brand, and date of production. GVWR: Gross Vehicle Weight Rating. See Vehicle Load Limits on page 9‑16. GAWR FRT: Gross Axle Weight Rating for the front axle. See Vehicle Load Limits on page 9‑16.

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GAWR RR: Gross Axle Weight Rating for the rear axle. See Vehicle Load Limits on page 9‑16. Intended Outboard Sidewall: The side of an asymmetrical tire, that must always face outward when mounted on a vehicle. Kilopascal (kPa): The metric unit for air pressure. Light Truck (LT‐Metric) Tire: A tire used on light duty trucks and some multipurpose passenger vehicles. Load Index: An assigned number ranging from 1 to 279
that corresponds to the load carrying capacity of a tire. Maximum Inflation Pressure: The maximum air pressure to which a cold tire can be inflated. The maximum air pressure is molded onto the sidewall.

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Vehicle Care

Maximum Load Rating: The load rating for a tire at the maximum permissible inflation pressure for that tire. Maximum Loaded Vehicle Weight: The sum of curb weight, accessory weight, vehicle capacity weight, and production options weight. Normal Occupant Weight: The number of occupants a vehicle is designed to seat multiplied by 68 kg (150 lbs). See Vehicle Load Limits on page 9‑16. Occupant Distribution: Designated seating positions. Outward Facing Sidewall: The side of an asymmetrical tire that has a particular side that faces outward when mounted on a vehicle. The side of the tire that contains a whitewall, bears white lettering, or bears manufacturer, brand, and/or

model name molding that is higher or deeper than the same