2015 GMC Acadia Owners Manual

2. Twist the compartment

5. Squeeze the housing cover (1)

retainers (1) and pull outward to remove.

4.

3. Lower the instrument panel compartment assembly (2) beyond the stops. If needed, unsnap the instrument panel compartment assembly (2) from the instrument panel. When reinstalling, be sure the instrument panel compartment dampener arm is aligned properly to the dampener gear assembly.

tabs to remove.

6. Remove the old air filter from the passenger compartment air filter housing (2). Install the new air filter.

7. 8. Replace the housing cover. 9.

If removed, reinstall the instrument panel compartment assembly.

10. Reinstall the compartment

retainers.

See your dealer if additional assistance is needed.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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Driving and Operating

Driving Information

Distracted Driving . . . . . . . . . . . . . 9-2
Defensive Driving . . . . . . . . . . . . . 9-3
Drunk Driving . . . . . . . . . . . . . . . . . 9-3
Control of a Vehicle . . . . . . . . . . . 9-3
Braking . . . . . . . . . . . . . . . . . . . . . . . 9-3
Steering . . . . . . . . . . . . . . . . . . . . . . . 9-4
Off-Road Recovery . . . . . . . . . . . . 9-5
Loss of Control . . . . . . . . . . . . . . . . 9-5
Driving on Wet Roads . . . . . . . . . 9-6
Hill and Mountain Roads . . . . . . 9-6
Winter Driving . . . . . . . . . . . . . . . . . 9-7
If the Vehicle Is Stuck . . . . . . . . . 9-9
Vehicle Load Limits . . . . . . . . . . . 9-9

Starting and Operating

New Vehicle Break-In . . . . . . . . 9-14
Ignition Positions . . . . . . . . . . . . 9-14
Starting the Engine . . . . . . . . . . 9-16
Engine Heater . . . . . . . . . . . . . . . 9-17
Retained Accessory

Power (RAP) . . . . . . . . . . . . . . . 9-19

Shifting Into Park . . . . . . . . . . . . 9-19
Shifting out of Park . . . . . . . . . . 9-20
Parking over Things

That Burn . . . . . . . . . . . . . . . . . . 9-21

Engine Exhaust

Engine Exhaust . . . . . . . . . . . . . . 9-21
Running the Vehicle While

Parked . . . . . . . . . . . . . . . . . . . . . 9-22

Automatic Transmission

Automatic Transmission . . . . . 9-22
Manual Mode . . . . . . . . . . . . . . . . 9-24
Tow/Haul Mode . . . . . . . . . . . . . . 9-25

Drive Systems

All-Wheel Drive . . . . . . . . . . . . . . 9-26

Brakes

Antilock Brake

System (ABS) . . . . . . . . . . . . . . 9-26
Parking Brake . . . . . . . . . . . . . . . 9-27
Brake Assist . . . . . . . . . . . . . . . . . 9-28
Hill Start Assist (HSA) . . . . . . . 9-28

Ride Control Systems

Traction Control/Electronic

Stability Control . . . . . . . . . . . . 9-28

Driving and Operating

9-1

Cruise Control

Cruise Control . . . . . . . . . . . . . . . 9-30

Driver Assistance Systems Forward Collision Alert (FCA)

System . . . . . . . . . . . . . . . . . . . . . 9-33
Parking Assist . . . . . . . . . . . . . . . 9-35
Side Blind Zone

Alert (SBZA) . . . . . . . . . . . . . . . 9-36

Rear Vision

Lane Departure

Camera (RVC) . . . . . . . . . . . . . 9-38

Warning (LDW) . . . . . . . . . . . . . 9-40

Fuel

Fuel . . . . . . . . . . . . . . . . . . . . . . . . . 9-42
California Fuel

Requirements . . . . . . . . . . . . . . 9-43
Fuels in Foreign Countries . . . 9-43
Fuel Additives . . . . . . . . . . . . . . . 9-43
Filling the Tank . . . . . . . . . . . . . . 9-43
Filling a Portable Fuel

Container . . . . . . . . . . . . . . . . . . . 9-45

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9-2

Driving and Operating

Trailer Towing General Towing

Information . . . . . . . . . . . . . . . . . 9-46

Driving Characteristics and

Towing Tips . . . . . . . . . . . . . . . . 9-46
Trailer Towing . . . . . . . . . . . . . . . . 9-49
Towing Equipment . . . . . . . . . . . 9-51

Conversions and Add-Ons

Add-On Electrical

Equipment . . . . . . . . . . . . . . . . . 9-53

Driving Information

Distracted Driving Distraction comes in many forms and can take your focus from the task of driving. Exercise good judgment and do not let other activities divert your attention away from the road. Many local governments have enacted laws regarding driver distraction. Become familiar with the local laws in your area. To avoid distracted driving, always keep your eyes on the road, hands on the wheel, and mind on the drive. . Do not use a phone in

demanding driving situations. Use a hands-free method to place or receive necessary phone calls.

. Watch the road. Do not read,

take notes, or look up information on phones or other electronic devices.

. Designate a front seat

passenger to handle potential distractions.

. Become familiar with vehicle

features before driving, such as programming favorite radio stations and adjusting climate control and seat settings. Program all trip information into any navigation device prior to driving.

. Wait until the vehicle is parked

to retrieve items that have fallen to the floor.

. Stop or park the vehicle to tend

to children.

. Keep pets in an appropriate

carrier or restraint.

. Avoid stressful conversations while driving, whether with a passenger or on a cell phone.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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{ Warning

Taking your eyes off the road too long or too often could cause a crash resulting in injury or death. Focus your attention on driving.

Refer to the Infotainment section and the infotainment manual for more information on using that system, including pairing and using a cell phone.

Defensive Driving Defensive driving means “always expect the unexpected.” The first step in driving defensively is to wear the safety belt. See Safety Belts on page 3-14. . Assume that other road users

(pedestrians, bicyclists, and other drivers) are going to be careless and make mistakes. Anticipate what they might do and be ready.

. Allow enough following distance

between you and the driver in front of you. Focus on the task of driving.

Drunk Driving Death and injury associated with drinking and driving is a global tragedy.

{ Warning

Drinking and then driving is very dangerous. Your reflexes, perceptions, attentiveness, and judgment can be affected by even a small amount of alcohol. You can have a serious — or even fatal — collision if you drive after drinking. Do not drink and drive or ride with a driver who has been drinking. Ride home in a cab; or if you are with a group, designate a driver who will not drink.

Driving and Operating

9-3

Control of a Vehicle Braking, steering, and accelerating are important factors in helping to control a vehicle while driving.

Braking Braking action involves perception time and reaction time. Deciding to push the brake pedal is perception time. Actually doing it is reaction time. Average driver reaction time is about three-quarters of a second. In that time, a vehicle moving at 100 km/h (60 mph) travels 20 m (66 ft), which could be a lot of distance in an emergency. Helpful braking tips to keep in mind include: . Keep enough distance between

you and the vehicle in front of you.

. Avoid needless heavy braking. . Keep pace with traffic.

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9-4

Driving and Operating

If the engine ever stops while the vehicle is being driven, brake normally but do not pump the brakes. Doing so could make the pedal harder to push down. If the engine stops, there will be some power brake assist but it will be used when the brake is applied. Once the power assist is used up, it can take longer to stop and the brake pedal will be harder to push.

Steering

Variable Effort Steering Some vehicles have a steering system that varies the amount of effort required to steer the vehicle in relation to the speed of the vehicle. The amount of steering effort required is less at slower speeds to make the vehicle more maneuverable and easier to park. At faster speeds, the steering effort increases to provide a sport-like feel to the steering. This provides maximum control and stability.

If the vehicle seems harder to steer than normal when parking or driving slowly, there may be a problem with the system. You will still have power steering, but steering will be stiffer than normal at slow speeds. See your dealer for service. Hydraulic Power Steering This vehicle has hydraulic power steering. It may require maintenance. See Power Steering Fluid on page 10-18. If power steering assist is lost because the engine stops, or there is a system malfunction, the vehicle can be steered but may require increased effort. See your dealer if there is a problem.

{ Caution

If the steering wheel is turned until it reaches the end of its travel, and is held in that position for more than 15 seconds,

(Continued)

Caution (Continued)

damage may occur to the power steering system and there may be loss of power steering assist.

Curve Tips

Take curves at a reasonable speed.

. Reduce speed before entering a

curve.

. Maintain a reasonable, steady

speed through the curve.

. Wait until the vehicle is out of the curve before accelerating gently into the straightaway.

Steering in Emergencies

There are some situations when steering around a problem may be more effective than braking.

. Holding both sides of the

steering wheel allows you to turn 180 degrees without removing a hand.

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. Antilock Brake System (ABS) allows steering while braking.

Off-Road Recovery

The vehicle's right wheels can drop off the edge of a road onto the shoulder while driving. Follow these tips: 1. Ease off the accelerator and then, if there is nothing in the way, steer the vehicle so that it straddles the edge of the pavement.

2. Turn the steering wheel about one-eighth of a turn, until the right front tire contacts the pavement edge.

3. Turn the steering wheel to go

straight down the roadway.

Loss of Control

Skidding There are three types of skids that correspond to the vehicle's three control systems: . Braking Skid — wheels are not

rolling.

. Steering or Cornering Skid —

too much speed or steering in a curve causes tires to slip and lose cornering force.

. Acceleration Skid — too much

throttle causes the driving wheels to spin.

Driving and Operating

9-5

Defensive drivers avoid most skids by taking reasonable care suited to existing conditions, and by not overdriving those conditions. But skids are always possible. If the vehicle starts to slide, follow these suggestions: . Ease your foot off the

accelerator pedal and steer the way you want the vehicle to go. The vehicle may straighten out. Be ready for a second skid if it occurs.

. Slow down and adjust your driving according to weather conditions. Stopping distance can be longer and vehicle control can be affected when traction is reduced by water, snow, ice, gravel, or other material on the road. Learn to recognize warning clues — such as enough water, ice, or packed snow on the road to make a mirrored surface — and slow down when you have any doubt.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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9-6

Driving and Operating

Try to avoid sudden steering, acceleration, or braking, including reducing vehicle speed by shifting to a lower gear. Any sudden changes could cause the tires to slide.

Remember: Antilock brakes help avoid only the braking skid.

Driving on Wet Roads Rain and wet roads can reduce vehicle traction and affect your ability to stop and accelerate. Always drive slower in these types of driving conditions and avoid driving through large puddles and deep‐standing or flowing water.

{ Warning

Wet brakes can cause crashes. They might not work as well in a quick stop and could cause pulling to one side. You could lose control of the vehicle.

(Continued)

Warning (Continued)

After driving through a large puddle of water or a car/vehicle wash, lightly apply the brake pedal until the brakes work normally. Flowing or rushing water creates strong forces. Driving through flowing water could cause the vehicle to be carried away. If this happens, you and other vehicle occupants could drown. Do not ignore police warnings and be very cautious about trying to drive through flowing water.

Hydroplaning Hydroplaning is dangerous. Water can build up under the vehicle's tires so they actually ride on the water. This can happen if the road is wet enough and you are going fast enough. When the vehicle is hydroplaning, it has little or no contact with the road.

There is no hard and fast rule about hydroplaning. The best advice is to slow down when the road is wet. Other Rainy Weather Tips Besides slowing down, other wet weather driving tips include: . Allow extra following distance. . Pass with caution. . Keep windshield wiping

equipment in good shape.

. Keep the windshield washer fluid

reservoir filled.

. Have good tires with proper

tread depth. See Tires on page 10-37. Turn off cruise control.

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.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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Driving and Operating

9-7

. Check all fluid levels and brakes,

tires, cooling system, and transmission.

. Shift to a lower gear when going

down steep or long hills.

{ Warning

Using the brakes to slow the vehicle on a long downhill slope can cause brake overheating, can reduce brake performance, and could result in a loss of braking. Shift the transmission to a lower gear 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. This can cause overheating of the brakes and

(Continued)

Warning (Continued)

loss of steering. Always have the engine running and the vehicle in gear.

. 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.

. Be alert on top of hills;

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.

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. Traction Control should be turned on. See Traction Control/Electronic Stability Control on page 9-28. The Antilock Brake System (ABS) improves vehicle stability during hard stops on slippery roads, but apply the brakes sooner than when on dry pavement. See Antilock Brake System (ABS) on page 9-26. 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

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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9-8

Driving and Operating

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 on slippery surfaces. Blizzard Conditions Being stuck in snow can be a serious situation. Stay with the vehicle unless there is help nearby. If possible, use Roadside Assistance. See Roadside Assistance Program on page 13-5. To get help and keep everyone in the vehicle safe:

Turn on the hazard warning flashers. 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.

. Open a window about 5 cm

(2 in) on the side of the vehicle that is away from the wind to bring in fresh air.

(Continued)

Warning (Continued)

. 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 Systems.”

For more information about carbon monoxide, see Engine Exhaust on page 9-21.

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.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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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 the Vehicle Is Stuck Slowly and cautiously spin the wheels to free the vehicle when stuck in sand, mud, ice, or snow. If stuck too severely for the traction system to free the vehicle, turn the traction system off and use the rocking method. See Traction Control/Electronic Stability Control on page 9-28.

Driving and Operating

9-9

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 the Vehicle on page 10-72.

Vehicle Load Limits 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/Tire label.

{ 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 56 km/h (35 mph).

Rocking the Vehicle to Get it Out Turn the steering wheel left and right to clear the area around the front wheels. Turn off any traction system. Shift back and forth between R (Reverse) and a low 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.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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9-10

Driving and Operating

{ Warning

Tire and Loading Information Label

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). This can cause systems to break and change the way the vehicle handles. This could cause loss of control and a crash. Overloading can also shorten the life of the vehicle.

Example Label

A vehicle-specific Tire and Loading Information label is attached to the center pillar (B-pillar). The tire and loading information label shows the number of occupant seating positions (1), and the maximum vehicle capacity weight (2) in kilograms and pounds.

The Tire and Loading Information label also shows the size of the original equipment tires (3) and the recommended cold tire inflation pressures (4). For more information on tires and inflation see Tires on page 10-37 and Tire Pressure on page 10-45. There is also important loading information on the vehicle Certification/Tire 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/Tire Label” later in this section. “Steps for Determining Correct Load Limit– 1. Locate the statement "The

combined weight of occupants and cargo should

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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Driving and Operating

9-11

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.)

5. Determine the combined

6.

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, 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 Trailer Towing on page 9-49
for important information on towing a trailer, towing safety rules and trailering tips.

Example 1

1. Vehicle Capacity Weight for Example 1 = 453 kg (1,000 lbs).

2. Subtract Occupant Weight

@ 68 kg (150 lbs) × 2 = 136 kg (300 lbs).

3. Available Occupant and Cargo Weight = 317 kg (700 lbs).

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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9-12

Driving and Operating

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

Certification/Tire Label

Example 2

Example 3

1. Vehicle Capacity Weight for Example 2 = 453 kg (1,000 lbs).

2. Subtract Occupant Weight

@ 68 kg (150 lbs) × 5 = 340 kg (750 lbs).

3. Available Cargo Weight =

113 kg (250 lbs).

1. Vehicle Capacity Weight for Example 3 = 453 kg (1,000 lbs).

2. Subtract Occupant Weight

@ 91 kg (200 lbs) × 5 = 453 kg (1,000 lbs).

3. Available Cargo Weight =

0 kg (0 lbs).

Refer to your vehicle's tire and loading information label for specific information about your vehicle's capacity weight and

Label Example

A vehicle-specific Certification/ Tire label is attached to the center pillar (B-pillar). The label shows the gross weight capacity of your vehicle. This is called the Gross Vehicle Weight Rating (GVWR).

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

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The GVWR includes the weight of the vehicle, all occupants, fuel, and cargo. The Certification/Tire label also tells you the maximum weights for the front and rear axles, called the Gross Axle Weight Rating (GAWR). To find out the actual loads on your front and rear axles, you need to go to a weigh station and weigh your vehicle. Your dealer can help you with this. Be sure to spread out your load equally on both sides of the centerline. Never exceed the GVWR for your vehicle or the GAWR for either the front or rear axle.

{ Warning

Warning (Continued)

(GVWR), or either the maximum front or rear Gross Axle Weight Rating (GAWR). This can cause systems to break and change the way the vehicle handles. This could cause loss of control and a crash. Overloading can also shorten the life of the vehicle.

{ Caution

Overloading the vehicle may cause damage. Repairs would not be covered by the vehicle warranty. Do not overload the vehicle.

Do not load the vehicle any heavier than the Gross Vehicle Weight Rating

(Continued)

If you put things inside your vehicle — like suitcases, tools, packages, or anything else, they will go as fast as the vehicle

Driving and Operating

9-13

goes. If you have to stop or turn quickly, or if there is a crash, they will keep going.

{ 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. 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.

(Continued)

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9-14

Driving and Operating

Warning (Continued)

. When you carry something

inside the vehicle, secure it whenever you can.

. Do not leave a seat folded down unless you need to.

Starting and Operating

New Vehicle Break-In

{ Caution

The vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: . Do not drive at any one

constant speed, fast or slow, for the first 805 km (500 mi). Do not make full-throttle starts. Avoid downshifting to brake or slow the vehicle.

. Avoid making hard stops for

the first 322 km (200 mi) or so. During this time the new brake linings are not yet broken in. Hard stops with new linings can mean premature wear and earlier replacement. Follow this

(Continued)

Caution (Continued)

breaking-in guideline every time you get new brake linings.

Following break-in, engine speed and load can be gradually increased.

Ignition Positions

The ignition switch has four different positions.

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Driving and Operating

9-15

In order to shift out of P (Park), the ignition must be in ON/RUN or ACC/ ACCESSORY and the brake pedal must be applied.

{ Caution

Using a tool to force the key to turn in the ignition could cause damage to the switch or break the key. Use the correct key, make sure it is all the way in, and turn it only with your hand. If the key cannot be turned by hand, see your dealer.

( (STOPPING THE ENGINE/ LOCK/OFF): When the vehicle is stopped, turn the ignition switch to LOCK/OFF to turn the engine off. Retained Accessory Power (RAP) will remain active. See Retained Accessory Power (RAP) on page 9-19.

This position locks the ignition, transmission, and the steering wheel when the key Is removed from the ignition. The key can be removed in LOCK/OFF. The steering can bind with the wheels turned off center. If this happens, move the steering wheel from right to left while turning the key to ACC/ACCESSORY. If this does not work, then the vehicle needs service. Do not turn the engine off when the vehicle is moving. This will cause a loss of power assist in the brake and steering systems and disable the airbags. If the vehicle must be shut off in an emergency: 1. Brake using a firm and steady

pressure. Do not pump the brakes repeatedly. This may deplete power assist, requiring increased brake pedal force.

2. Shift the vehicle to N (Neutral).

This can be done while the vehicle is moving. After shifting to N (Neutral), firmly apply the brakes and steer the vehicle to a safe location.

3. Come to a complete stop, shift to P (Park), and turn the ignition to LOCK/OFF. On vehicles with an automatic transmission, the shift lever must be in P (Park) to turn the ignition switch to the LOCK/OFF position.

4. Set the parking brake. See

Parking Brake on page 9-27.

{ Warning

Turning off the vehicle while moving may cause loss of power assist in the brake and steering systems and disable the airbags. While driving, only shut the vehicle off in an emergency.

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9-16

Driving and Operating

If the vehicle cannot be pulled over, and must be shut off while driving, turn the ignition to ACC/ ACCESSORY. ACC (ACC/ACCESSORY): This is the position in which you can operate the electrical accessories or items plugged into the accessory power outlets. This position unlocks the ignition and steering wheel. Use this position if the vehicle must be pushed or towed. R (ON/RUN): This position can be used to operate the electrical accessories and to display some instrument panel warning and indicator lights. This position can also be used for service and diagnostics, and to verify the proper operation of the malfunction indicator lamp as may be required for emission inspection purposes. The switch stays in this position when the engine is running. The transmission is also unlocked in this position. If you leave the key in the ACC/ACCESSORY or ON/RUN position with the engine off, the

battery could be drained. You may not be able to start the vehicle if the battery is allowed to drain for an extended period of time. / (START): This is the position that starts the engine. When the engine starts, release the key. The ignition switch will return to ON/RUN for driving. Key Lock Release The vehicle has an electronic key lock release system. This system is to prevent ignition key removal unless the shift lever is in P (Park). The key lock release will not work if the battery is charged less than 9-volts, or uncharged. Try charging or jump starting the battery. See Jump Starting on page 10-69

Starting the Engine Move the shift lever to P (Park) or N (Neutral). The engine will not start in any other position. To restart the engine when the vehicle is already moving, use N (Neutral) only.

{ Caution

Do not try to shift to P (Park) if the vehicle is moving. If you do, you could damage the transmission. Shift to P (Park) only when the vehicle is stopped.

{ Caution

If you add electrical parts or accessories, you could change the way the engine operates. Any resulting damage would not be covered by the vehicle warranty. See Add-On Electrical Equipment on page 9-53.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (17,1)

{ Caution

{ Caution

If the steering wheel is turned until it reaches the end of its travel, and is held in that position while starting the vehicle, damage may occur to the hydraulic power steering system and there may be loss of power steering assist.

Starting Procedure 1. With your foot off the accelerator pedal, turn the ignition to START. When the engine starts, let go of the key. The idle speed will slow down as the engine warms. Do not race the engine immediately after starting it. Operate the engine and transmission gently to allow the oil to warm up and lubricate all moving parts.

Cranking the engine for long periods of time, by returning the ignition to the START position immediately after cranking has ended, can overheat and damage the cranking motor, and drain the battery. Wait at least 15 seconds between each try, to let the cranking motor cool down.

2.

If the engine does not start after five to 10 seconds, especially in very cold weather (below −18°C or 0°F), it could be flooded with too much gasoline. Try pushing the accelerator pedal all the way to the floor and holding it there as you hold the key in START for up to a maximum of 15 seconds. Wait at least 15 seconds between each try, to allow the cranking motor to cool

Driving and Operating

9-17

down. When the engine starts, let go of the key and accelerator. If the vehicle starts briefly but then stops again, repeat these steps. This clears the extra gasoline from the engine. Do not race the engine immediately after starting it. Operate the engine and transmission gently until the oil warms up and lubricates all moving parts.

Engine Heater The engine coolant heater can provide easier starting and better fuel economy during engine warm-up in cold weather conditions at or below 0°F (−18°C). Vehicles with an engine coolant heater should be plugged in at least four hours before starting. Some models may have an internal thermostat in the cord which will prevent engine coolant heater operation at temperatures above 0°F (−18°C).

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (18,1)

9-18

Driving and Operating

To Use the Engine Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the

electrical cord. The bundled cord is located on the driver side of the engine compartment, between the engine air cleaner and the windshield washer fluid reservoir. See Engine Compartment Overview on page 10-5. Check the heater cord for damage. If it is damaged, do not use it. See your dealer for a replacement. Inspect the cord for damage yearly.

3. Plug the cord into a normal, grounded 110-volt AC outlet.

{ Warning

Improper use of the heater cord or an extension cord can damage the cord and may result in overheating and fire.

. Plug the cord into a

three-prong electrical utility receptacle that is protected by a ground fault detection function. An ungrounded outlet could cause an electric shock.

. Use a weatherproof,

heavy-duty, 15 amp-rated extension cord if needed. Failure to use the recommended extension cord in good operating condition, or using a damaged heater or extension cord, could make it (Continued)

Warning (Continued)

overheat and cause a fire, property damage, electric shock, and injury.

. Do not operate the vehicle

with the heater cord permanently attached to the vehicle. Possible heater cord and thermostat damage could occur.

. While in use, do not let the

heater cord touch vehicle parts or sharp edges. Never close the hood on the heater cord.

. Before starting the vehicle,

unplug the cord, reattach the cover to the plug, and securely fasten the cord. Keep the cord away from any moving parts.

4. Before starting the engine, be

sure to unplug and store the cord as it was before to keep it

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (19,1)

Driving and Operating

9-19

away from moving engine parts. If you do not, it could be damaged.

The length of time the heater should remain plugged in depends on several factors. Ask a dealer in the area where you will be parking the vehicle for the best advice on this.

Retained Accessory Power (RAP) These vehicle accessories can be used for up to 10 minutes after the ignition key is turned off: . Audio System . Power Windows . Sunroof (if equipped) Power to the windows and sunroof will work up to 10 minutes or until a door is opened. The radio continues to work for 10 minutes or until the driver door is opened.

For an additional 10 minutes of operation, close all the doors and turn the key to ON/RUN and then back to LOCK/OFF. All these features will work when the key is in the ON/RUN or ACC/ ACCESSORY positions.

Shifting Into Park 1. Hold the brake pedal down and

set the parking brake. See Parking Brake on page 9-27 for more information.

2. Move the shift lever into P (Park)

by holding in the button on the shift lever and pushing the shift lever all the way toward the front of the vehicle.

3. Turn the ignition key to

LOCK/OFF.

4. Remove the key and take it with you. If you can leave the vehicle with the ignition key in your hand, the vehicle is in P (Park).

Leaving the Vehicle with the Engine Running

{ Warning

It can be dangerous to leave the vehicle with the engine running. It could overheat and catch fire. It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. Do not leave the vehicle when the engine is running. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park on page 9-19. If you are towing a trailer, see Driving Characteristics and Towing Tips on page 9-46.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (20,1)

9-20

Driving and Operating

If you have to leave the vehicle with the engine running, be sure the vehicle is in P (Park) and the parking brake is firmly set before you leave it. After you have moved the shift lever into P (Park), hold the regular brake pedal down. Then, see if you can move the shift lever away from P (Park) without first pushing the button. If you can, it means that the shift lever was not fully locked in P (Park). Torque Lock Torque lock is when the weight of the vehicle puts too much force on the parking pawl in the transmission. This happens when parking on a hill and shifting the transmission into P (Park) is not done properly and then it is difficult to shift out of P (Park). To prevent torque lock, set the parking brake and then shift into P (Park). To find out how, see “Shifting Into Park” listed previously.

If torque lock does occur, your vehicle may need to be pushed uphill by another vehicle to relieve the parking pawl pressure, so you can shift out of P (Park).

Shifting out of Park The vehicle is equipped with an electronic shift lock release system. The shift lock release is designed to: . Prevent ignition key removal

unless the shift lever is in P (Park) with the shift lever button fully released, and

. Prevent movement of the shift

lever out of P (Park), unless the ignition is in ON/RUN or ACC/ ACCESSORY and the regular brake pedal is applied.

The shift lock release is always functional except in the case of an uncharged or low voltage (less than 9-volt) battery.

If the vehicle has an uncharged battery or a battery with low voltage, try charging or jump starting the battery. See Jump Starting on page 10-69 for more information. To shift out of P (Park): 1. Place the ignition in ON/RUN. 2. Apply the brake pedal. 3. Press the shift lever button. 4. Move the shift lever to the

desired position.

If you still are unable to shift out of P (Park): 1. Fully release the shift lever

button.

2. While holding down the brake

pedal, press the shift lever button again.

3. Move the shift lever to the

desired position.

If you still cannot move the shift lever from P (Park), see your dealer.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (21,1)

Parking over Things That Burn

{ Warning

Things that can burn could touch hot exhaust parts under the vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn.

Driving and Operating

9-21

Warning (Continued)

. There are holes or openings

in the vehicle body from damage or aftermarket modifications that are not completely sealed.

If unusual fumes are detected or if it is suspected that exhaust is coming into the vehicle:

. Drive it only with the windows

completely down.

. Have the vehicle repaired

immediately.

Never park the vehicle with the engine running in an enclosed area such as a garage or a building that has no fresh air ventilation.

Engine Exhaust { Warning

Engine exhaust contains carbon monoxide (CO) which cannot be seen or smelled. Exposure to CO can cause unconsciousness and even death. Exhaust may enter the vehicle if:

. The vehicle idles in areas

with poor ventilation (parking garages, tunnels, deep snow that may block underbody airflow or tail pipes).

. The exhaust smells or

sounds strange or different.

. The exhaust system leaks

due to corrosion or damage. . The vehicle exhaust system

has been modified, damaged, or improperly repaired.

(Continued)

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (22,1)

9-22

Driving and Operating

Automatic Transmission

Running the Vehicle While Parked It is better not to park with the engine running. If the vehicle is left with the engine running, follow the proper steps to be sure the vehicle will not move. See Shifting Into Park on page 9-19
and Engine Exhaust on page 9-21. If parking on a hill and pulling a trailer, see Driving Characteristics and Towing Tips on page 9-46.

P (Park): This position locks the front wheels. It is the best position to use when starting the engine because the vehicle cannot move easily.

{ Warning

It is dangerous to get out of the vehicle if the shift lever is not fully in P (Park) with the parking brake firmly set. The vehicle can roll. Do not leave the vehicle when the engine is running. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure the vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to P (Park). See Shifting Into Park on page 9-19 and Driving Characteristics and Towing Tips on page 9-46.

Make sure the shift lever is fully in P (Park) before starting the engine. The vehicle has an automatic transmission shift lock control system. With the ignition in ON/ RUN, fully apply the regular brake,

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (23,1)

Driving and Operating

9-23

then press the button on the back of the shift lever before shifting from P (Park). If you cannot shift out of P (Park), ease pressure on the shift lever, then push the shift lever all the way into P (Park) as you maintain brake application. Then press the shift lever button and move the shift lever into another gear. See Shifting out of Park on page 9-20. R (Reverse): Use this gear to back up.

{ Caution

Shifting to R (Reverse) while the vehicle is moving forward could damage the transmission. The repairs would not be covered by the vehicle warranty. Shift to R (Reverse) only after the vehicle is stopped.

To rock the vehicle back and forth to get out of snow, ice, or sand without damaging the transmission, see If the Vehicle Is Stuck on page 9-9. N (Neutral): In this position, the engine does not connect with the wheels. To restart the engine when the vehicle is already moving, use N (Neutral) only. Also, use N (Neutral) when the vehicle is being towed.

{ Warning

Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is firmly on the brake pedal, the vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while the engine is running at high speed.

{ Caution Shifting out of P (Park) or N (Neutral) with the engine running at high speed may damage the transmission. The repairs would not be covered by the vehicle warranty. Be sure the engine is not running at high speed when shifting the vehicle.

D (Drive): This position is for normal driving. It provides the best fuel economy. If you need more power for passing, and you are: . Going less than 56 km/h

(35 mph), push the accelerator pedal about halfway down.

. Going about 56 km/h (35 mph) or

more, push the accelerator all the way down.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (24,1)

9-24

Driving and Operating

{ Caution

Manual Mode

Electronic Range Select (ERS) Mode ERS mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving downhill or towing a trailer. The vehicle has an electronic shift position indicator within the instrument cluster. When using the ERS mode a number will display next to the L, indicating the current gear that has been selected.

If the vehicle accelerates slowly, or does not shift gears, the transmission could be damaged. Have the vehicle serviced right away.

If the vehicle is stopped on a hill, with your foot off the brake pedal, the vehicle may roll. This is normal and is due to the torque converter designed to improve fuel economy and performance. Use the brake to hold the vehicle on a hill. Do not use the accelerator pedal. L (Low): This position gives you access to gear ranges. This provides more engine braking but lower fuel economy than D (Drive). You can use it on very steep hills, or in deep snow or mud. See Manual Mode on page 9-24.

To use this feature: 1. Move the shift lever to L (Low). 2. Press the plus/minus button on

the shift lever, to increase or decrease the gear range available.

When you shift from D (Drive) to L (Low), the transmission will shift to a pre-determined lower gear range. The highest gear available for this pre-determined range is displayed next to the L in the DIC. See Driver Information Center (DIC) on page 5-23. The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. This means that all gears below that number are available. For example, when 4 (Fourth) is shown next to the L, 1 (First) through 4 (Fourth) gears are automatically shifted by the vehicle. The transmission will not shift into 5 (Fifth) until the + (Plus) button is used or you shift back into D (Drive).

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (25,1)

Driving and Operating

9-25

While in L (Low), the transmission will prevent shifting to a lower gear range if the engine speed is too high. You have a brief period of time to slow the vehicle. If vehicle speed is not reduced within the time allowed, the lower gear range shift will not be completed. You must further slow the vehicle, then press the − (Minus) button to the desired lower gear range. Automatic Engine Grade Braking is not available when the ERS is active. It is available in D (Drive) for both normal and Tow/Haul mode. While using the ERS, cruise control and the Tow/Haul mode can be used. See “Tow/Haul Mode” following.

If equipped with

Tow/Haul Mode _ (Tow/Haul): Tow/Haul mode, the button is on the center stack under the climate controls. Press the button to activate the system. Press it again to deactivate the system. This feature can assist when towing or hauling a heavy load. When Tow/Haul is activated, the Tow/Haul symbol will come on in the instrument cluster. See Driving Characteristics and Towing Tips on page 9-46.

Automatic Engine Grade Braking Automatic Engine Grade Braking assists when driving on a downhill grade. It maintains vehicle speed by automatically implementing a shift schedule that uses the engine and the transmission to slow the vehicle. The system will automatically command downshifts to reduce vehicle speed, until the brake pedal is no longer being pressed. While in the Electronic Range Select (ERS) mode, grade braking is deactivated, allowing the driver to select a range and limiting the highest gear available. Grade braking is available for normal driving and in Tow/Haul mode. See Automatic Transmission on page 9-22.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (26,1)

9-26

Driving and Operating

Drive Systems

Brakes

All-Wheel Drive Vehicles with this feature transfer engine power, as required, to all four wheels. It is fully automatic, and adjusts itself as needed for road conditions. When using a compact spare tire on an AWD vehicle, the system automatically detects the compact spare and reduces AWD performance to protect the system. To restore full AWD operation and prevent excessive wear on the system, replace the compact spare with a full-size tire as soon as possible. See Compact Spare Tire on page 10-68.

Antilock Brake System (ABS) This vehicle has ABS, an advanced electronic braking system that helps prevent a braking skid. When the vehicle begins to drive away, ABS checks itself. A momentary motor or clicking noise might be heard while this test is going on, and it might even be noticed that the brake pedal moves a little. This is normal.

If there is a problem with ABS, this warning light stays on. See Antilock Brake System (ABS) Warning Light on page 5-19.

If driving safely on a wet road and it becomes necessary to slam on the brakes and continue braking to avoid a sudden obstacle, a computer senses the wheels are slowing down. If one of the wheels is about to stop rolling, the computer will separately work the brakes at each wheel. ABS can change the brake pressure to each wheel, as required, faster than any driver could. This can help you steer around the obstacle while braking hard. As the brakes are applied, the computer keeps receiving updates on wheel speed and controls braking pressure accordingly. Remember: ABS does not change the time needed to get a foot up to the brake pedal or always decrease stopping distance. If you get too close to the vehicle in front of you, there will not be enough time to apply the brakes if that vehicle

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (27,1)

Driving and Operating

9-27

suddenly slows or stops. Always leave enough room up ahead to stop, even with ABS. Using ABS Do not pump the brakes. Just hold the brake pedal down firmly and let ABS work. You may hear the ABS pump or motor operating and feel the brake pedal pulsate. This is normal. Braking in Emergencies ABS allows you to steer and brake at the same time. In many emergencies, steering can help more than even the very best braking.

Parking Brake

To set the parking brake, hold the regular brake pedal down, then push the parking brake pedal down. If the ignition is on, the brake system warning light will come on. See Brake System Warning Light on page 5-18.

{ Caution

Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving.

To release the parking brake, hold the regular brake pedal down, then push down momentarily on the parking brake pedal until you feel the pedal release. Slowly pull your foot up off the parking brake pedal. If the parking brake is not released when you begin to drive, the brake system warning light will be on and a chime will sound warning you that the parking brake is still on. If you are towing a trailer and are parking on a hill, see Driving Characteristics and Towing Tips on page 9-46.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (28,1)

9-28

Driving and Operating

Brake Assist The Brake Assist feature is designed to assist the driver in stopping or decreasing vehicle speed in emergency driving conditions. This feature uses the stability system hydraulic brake control module to supplement the power brake system under conditions where the driver has quickly and forcefully applied the brake pedal in an attempt to quickly stop or slow down the vehicle. The stability system hydraulic brake control module increases brake pressure at each corner of the vehicle until the ABS activates. Minor brake pedal pulsation or pedal movement during this time is normal and the driver should continue to apply the brake pedal as the driving situation dictates. The Brake Assist feature will automatically disengage when the brake pedal is released or brake pedal pressure is quickly decreased.

Hill Start Assist (HSA) This vehicle has an HSA feature, which may be useful when the vehicle is stopped on a grade sufficient enough to activate HSA. This feature is designed to prevent the vehicle from rolling, either forward or rearward, during vehicle drive off. After the driver completely stops and holds the vehicle in a complete standstill on a grade, HSA will be automatically activated. During the transition period between when the driver releases the brake pedal and starts to accelerate to drive off on a grade, HSA holds the braking pressure for a maximum of two seconds to ensure that there is no rolling. The brakes will automatically release when the accelerator pedal is applied within the two-second window. It will not activate if the vehicle is in a drive gear and facing downhill, or if the vehicle is facing uphill and in R (Reverse).

Ride Control Systems

Traction Control/ Electronic Stability Control

System Operation The vehicle has a Traction Control System (TCS) and StabiliTrak®, an electronic stability control system. These systems help limit wheel slip and assist the driver in maintaining control, especially on slippery road conditions. TCS activates if it senses that any of the drive wheels are spinning or beginning to lose traction. When this happens, TCS applies the brakes to the spinning wheels and reduces engine power to limit wheel spin. StabiliTrak activates when the vehicle senses a difference between the intended path and the direction the vehicle is actually traveling. StabiliTrak selectively applies braking pressure to any one of the

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (29,1)

Driving and Operating

9-29

vehicle wheel brakes to assist the driver in keeping the vehicle on the intended path. If cruise control is being used and traction control or StabiliTrak begins to limit wheel spin, cruise control will disengage. Cruise control may be turned back on when road conditions allow. Both systems come on automatically when the vehicle is started and begins to move. The systems may be heard or felt while they are operating or while performing diagnostic checks. This is normal and does not mean there is a problem with the vehicle. It is recommended to leave both systems on for normal driving conditions, but it may be necessary to turn TCS off if the vehicle gets stuck in sand, mud, ice, or snow. See If the Vehicle Is Stuck on page 9-9 and “Turning the Systems Off and On” later in this section.

The indicator light for both systems is in the instrument cluster. This light will:

Flash when TCS is limiting wheel spin. Flash when StabiliTrak is activated. Turn on and stay on when either system is not working.

If either system fails to turn on or to activate, a message displays in the Driver Information Center (DIC), and d comes on and stays on to indicate that the system is inactive and is not assisting the driver in maintaining control. The vehicle is safe to drive, but driving should be adjusted accordingly.

If d comes on and stays on: 1. Stop the vehicle. 2. Turn the engine off and wait

15 seconds.

3. Start the engine. Drive the vehicle. If d comes on and stays on, the vehicle may need more time to diagnose the problem. If the condition persists, see your dealer. Turning the Systems Off and On

The button for TCS and StabiliTrak is on the center stack.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/ Mexico-7576030) - 2015 - CRC - 8/18/14

Black plate (30,1)

9-30

Driving and Operating

{ Caution

Do not repeatedly brake or accelerate heavily when TCS is off. The vehicle driveline could be damaged.

To turn off TCS and StabiliTrak, press and release the 4 button. The appropriate message displays in the DIC. To turn TCS and StabiliTrak on again, press and release the 4
button. The appropriate message displays in the DIC. See Ride Control System Messages on page 5-38. If TCS is limiting wheel spin when the 4 button is pressed, the system will not turn off until the wheels stop spinning. Adding accessories can affect the vehicle performance. See Accessories and Modifications on page 10-2.

Cruise Control With cruise control, a speed of about 40 km/h (25 mph) or more can be maintained without keeping your foot on the accelerator. Cruise control does not work at speeds below about 40 km/h (25 mph).

{ Warning

Cruise control can be dangerous where you cannot drive safely at