2012 GMC Terrain Owners Manual

page 10‑6.

3. Remove the four air cleaner

housing cover screws.

GMC Terrain Owner Manual (Include Mex) - 2012

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10-16

Vehicle Care

Cooling System

2.4 L L4 Engine

A. Engine Cooling Fan

(Out of View)

B. Engine Coolant Surge Tank and

Pressure Cap

3.0 L V6 Engine A. Engine Cooling Fans

(Out of View)

B. Engine Coolant Surge Tank and

Pressure Cap

{ WARNING

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

If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. The vehicle should be parked on a level surface.

GMC Terrain Owner Manual (Include Mex) - 2012

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The coolant level should be at the COLD FILL line. If it is not, the vehicle may have a leak at the radiator hoses, heater hoses, radiator, water pump, or somewhere else in the cooling system. { 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.

If there seems to be no leak, with the engine on, check to see if the electric engine cooling fan is running. If the engine is overheating, the fan should be running. If it is not, the vehicle needs service. Turn off the engine. 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.

Vehicle Care

10-17

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 10‑21.

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10-18

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.

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. 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.

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Checking Coolant The vehicle must be on a level surface when checking the coolant level. Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not do anything else until it cools down. If coolant is visible but the coolant level is not at or above the COLD FILL line, add a 50/50 mixture of clean, drinkable water and DEX-COOL coolant at the coolant surge tank, but be sure the cooling system is cool before this is done. See Cooling System on page 10‑16 for more information. The coolant surge tank is located in the engine compartment on the driver side of the vehicle. See Engine Compartment Overview on page 10‑6 for more information on location.

How to Add Coolant to the Coolant Surge Tank Notice: This vehicle has a specific coolant fill procedure. Failure to follow this procedure could cause the engine to overheat and be severely damaged. If you have not found a problem yet, check to see if coolant is visible in the coolant surge tank. If coolant is visible but the coolant level is not at the COLD FILL line, add a 50/50 mixture of clean, drinkable water and DEX-COOL coolant at the coolant surge tank, but be sure the cooling system, including the coolant surge tank pressure cap, is cool before you do it. See Engine Overheating on page 10‑21 for more information.

Vehicle Care

10-19

{ WARNING

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

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10-20

Vehicle Care

{ WARNING

{ 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.

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: In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. Use the recommended coolant and the proper coolant mixture.

1. Remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly counterclockwise about one-quarter of a turn. If you hear a hiss, wait for that to stop. This will allow any pressure still left to be vented out the discharge hose.

2. Keep turning the pressure cap

slowly, and remove it.

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Vehicle Care

10-21

Engine Overheating The vehicle has an indicator to warn of engine overheating. There is an engine coolant temperature warning light on the vehicle's instrument panel. See Engine Coolant Temperature Gauge on page 5‑10. The decision may be made not to lift the hood when this warning appears, but instead get service help right away. See Roadside Assistance Program (U.S. and Canada) on page 13‑8 or Roadside Assistance Program (Mexico) on page 13‑10.

By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper DEX-COOL coolant mixture to the coolant surge tank until the level reaches the COLD FILL line.

5. Replace the pressure cap. Be sure the pressure cap is hand-tight.

Check the level in the coolant surge tank when the cooling system has cooled down. If the coolant is not at the proper level, repeat Steps 1
through 3 and reinstall the pressure cap. If the coolant still is not at the proper level when the system cools down again, see your dealer.

3. Fill the coolant surge tank with the proper DEX-COOL coolant mixture, to the COLD FILL line.

4. With the coolant surge tank

pressure cap off, start the engine and let it run until the upper radiator hose can be felt getting hot. Watch out for the engine cooling fan.

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10-22

Vehicle Care

If the decision to lift the hood is made, make sure the vehicle is parked on a level surface. Then check to see if the engine cooling fan(s) are running. If the engine is overheating, the fan(s) should be running. If they are not, do not continue to run the engine and have the vehicle serviced. Notice: Engine damage from running the engine without coolant is not covered by the warranty.

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.

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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (23,1)

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.

Power Steering Fluid (2.4L L4 Engine) The vehicle has electric power steering and does not use power steering fluid.

Power Steering Fluid (3.0L V6 Engine)

The power steering fluid reservoir 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 reservoir location.

Vehicle Care

10-23

When to Check Power Steering Fluid The power steering fluid does not need to be checked unless there is a leak in the system or you hear an unusual noise. Have the system inspected and repaired if there is a fluid loss. How to Check Power Steering Fluid Notice: Extremely small amounts of contamination can cause steering system damage and cause it to not work properly. Do not allow contaminants to contact the fluid side of the reservoir cap/dipstick or from entering the reservoir. To check the power steering fluid: 1. Turn the engine off and let it

cool down.

2. Remove the engine cover. Refer

to Engine Cover on page 10‑9. 3. Wipe the cap and the top of the

reservoir clean.

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10-24

Vehicle Care

4. Unscrew the cap and wipe the

dipstick with a clean rag.

5. Replace the cap and completely

tighten it.

6. Remove the cap again and look at the fluid level on the dipstick.

The fluid level should be between MAX and MIN line at room temperature. If the fluid is on or below MIN line, add fluid. What to Use To determine what kind of fluid to use, refer to Recommended Fluids and Lubricants on page 11‑12. 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 11‑12.

Washer Fluid

Notice

What to Use Read the manufacturer's instructions before refilling the windshield washer fluid. 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 and add washer fluid until full. See Engine Compartment Overview on page 10‑6 for reservoir location.

. 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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (25,1)

Brakes This vehicle has disc brakes. Disc brake pads have built-in wear indicators that make a high-pitched warning sound when the brake pads are worn and new pads are needed. The sound can come and go or be heard all the time the vehicle is moving, except when applying the brake pedal firmly.

{ 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. 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

10-25

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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (26,1)

10-26

Vehicle Care

Brake Fluid

The brake master cylinder reservoir is filled with DOT 3 brake fluid as indicated on the reservoir cap. 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.

When the brake fluid falls to a low level, the brake warning light comes on. See Brake System Warning Light on page 5‑16.

What to Add Use only new DOT 3 brake fluid from a sealed container. See Recommended Fluids and Lubricants on page 11‑12. 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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (27,1)

Battery Refer to the replacement number on the original battery label when a new battery is needed. { WARNING

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

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.

Vehicle Care

10-27

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 10‑76 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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (28,1)

10-28

Vehicle Care

All-Wheel Drive

Transfer Case

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

How to Check Lubricant

2. Firmly apply both the parking brake and the regular brake. See Parking Brake on page 9‑36. 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). If the vehicle starts in any other position, contact your dealer for service.

If the level is below the bottom of the fill plug hole, located on the transfer case, the vehicle will need some lubricant added. Add enough lubricant to raise the level to the bottom of the fill plug hole. A fluid loss could indicate a problem; check and have it repaired, if needed.

What to Use Refer to Recommended Fluids and Lubricants on page 11‑12 to determine what kind of lubricant to use.

Starter Switch Check

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

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

1. Before starting this check, be

sure there is enough room around the vehicle.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (29,1)

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 9‑36. 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.

Vehicle Care

10-29

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.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (30,1)

10-30

Vehicle Care

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 11‑14. Notice: 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 your warranty. Do not allow the wiper blade arm to touch the windshield.

Front Wiper Blade Replacement To replace the front wiper blades: 1. Lift the wiper arm from the windshield until no further movement is possible.

Rear Wiper Blade Replacement The rear wiper blade and wiper arm have a cover for protection. The cover must be removed before the wiper blade can be replaced. To remove the cover:

2. Press the square button on the top side, at the end of the wiper arm, and pull the wiper blade out of the end of the wiper arm. Install the wiper blade connector by sliding into the end of the wiper arm until the square button on the wiper blade clicks into place with the wiper arm.

3.

4. Place the wiper arm with the wiper blade in place back on the windshield.

1. Slide a plastic tool under the

cover and push upward to unsnap.

2. Slide the cover towards the wiper blade tip to unhook it from the blade assembly.

3. Remove the cover. 4. After wiper blade replacement, ensure that cover hook slides into the slot in the blade assembly.

5. Snap the cover down to secure.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (31,1)

Headlamp Aiming The headlamp aiming system has been preset at the factory. If the vehicle is damaged in an accident, the aim of the headlamps may be affected and adjustment may be necessary. It is recommended that a dealer adjust the headlamps. To re-aim the headlamps yourself, use the following procedure. The vehicle should be properly prepared as follows. The vehicle: . Should be placed so the

headlamps are 7.6 m (25 ft) from a light colored wall.

. Must have all four tires on a

level surface which is level all the way to the wall.

Vehicle Care

10-31

. Should be placed so it is perpendicular to the wall or other flat surface.

. Should not have any snow, ice,

or mud on it.

. Should be fully assembled and

all other work stopped while headlamp aiming is being performed.

. Should be normally loaded with

a full tank of fuel and one person or 75 kg (160 lbs) sitting in the driver's seat. Tires should be properly inflated.

Headlamp aiming is done with the vehicle's low-beam headlamps. The high-beam headlamps will be correctly aimed if the low-beam headlamps are aimed properly.

To remove the wiper blade: 1. Lift the wiper arm away from the

windshield.

A. Wiper Arm B. Release Lever C. Blade Assembly

2. Push the release lever (B) to disengage the hook and push the wiper arm (A) out of the blade assembly (C).

3. Push the new blade assembly securely on the wiper arm until the release lever clicks into place.

4. Replace the wiper cover.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (32,1)

10-32

Vehicle Care

To adjust the vertical aim, do the following: 1. Open the hood. See Hood on

page 10‑5 for more information.

3. Measure the distance from the

5. Draw or tape a horizontal line (B)

ground to the aim dot on the low‐beam headlamp. Record the distance.

on the wall the width of the vehicle at the height of the mark in Step 4.

Notice: Do not cover a headlamp to improve beam cut-off when aiming. Covering a headlamp may cause excessive heat build-up which may cause damage to the headlamp. 6. Turn on the low-beam

headlamps and place a piece of cardboard or equivalent in front of the headlamp not being adjusted. This allows only the beam of light from the headlamp being adjusted to be seen on the flat surface.

4. At the wall, measure from the ground upward (A) to the recorded distance from Step 3 and mark it.

2. Locate the aim dot on the lens of

the low‐beam headlamp.

GMC Terrain Owner Manual (Include Mex) - 2012

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Vehicle Care

10-33

Bulb Replacement For the proper type of replacement bulbs, see Replacement Bulbs on page 10‑39. For any bulb changing procedure not listed in this section, contact your dealer.

9. Make sure that the light from the

headlamp is positioned at the bottom edge of the horizontal tape line. The lamp on the left (A) shows the correct headlamp aim. The lamp on the right (B) shows the incorrect headlamp aim.

10. Repeat Steps 7 through 9 for

the opposite headlamp.

7. Locate the vertical headlamp

aiming screws, which are under the hood near each headlamp assembly.

8. Turn the vertical aiming screw

until the headlamp beam is aimed to the horizontal tape line. Turn it clockwise or counterclockwise to raise or lower the angle of the beam.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (34,1)

10-34

Vehicle Care

Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps

To replace one of these bulbs: 1. Turn the tire to reach the access

port cap located in the front of wheel well cover.

A. Low-Beam Headlamp B. High-Beam Headlamp C. Sidemarker Lamp D. Park/Turn Signal Lamp

A. Screw B. Access Port Cap

2. Remove the screw (A) and turn the access port cap (B) counterclockwise to remove.

3.

If replacing a headlamp bulb, remove the dust cover cap from the back of the headlamp housing by turning the cap counterclockwise.

4. Turn the bulb socket

counterclockwise to remove it from the lamp assembly. 5. Remove the bulb from the

socket or disconnect the bulb assembly from the harness connector. Install the new bulb.

6. 7. Reinstall the bulb socket

to the lamp assembly, turning clockwise.

8. Replace the dust cover cap on

headlamps.

9. Reinstall the wheel well cover access port cap and secure by installing the screw.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (35,1)

Fog Lamps To replace one of these bulbs:

Vehicle Care

10-35

4. Push the bulb socket into the

fog lamp assembly and turn clockwise to lock it into place.

5. Reconnect the bulb socket to the

electrical connector.

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

Stop/Tail/Turn Signal/Sidemarker Lamp To replace one of these lamps: 1. Open the liftgate. See Liftgate

(Manual) on page 2‑9 or Liftgate (Power) on page 2‑10.

2. Remove the two screw covers

from the taillamp assembly.

1. Locate the fog lamp assembly

under the front facia.

2. Disconnect the bulb socket from

the electrical connector, turn, and pull out the bulb assembly.

3. Remove the old bulb from the bulb socket and push the new bulb straight into the bulb socket until it connects.

A. Stop/Tail/Turn Signal/

Sidemarker Lamp B. Auxiliary Taillamp C. Back-up Lamp

3. Remove the two screws

securing the taillamp assembly. 4. Pull the taillamp assembly out of

the vehicle body.

GMC Terrain Owner Manual (Include Mex) - 2012

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10-36

Vehicle Care

5. Disconnect the lamp wiring

harness.

6. Turn the bulb socket

counterclockwise and pull it out.

7. Pull the bulb straight out of the

socket. Install the new bulb.

8. 9. Push the bulb socket in and turn

it clockwise.

10. Reverse Steps 2 through 5 to

reinstall the lamp assembly.

11. Verify that the taillamp

assembly tab, located at the bottom of the taillamp assembly, is aligned to the facia bracket before securing with screws.

Auxiliary Taillamp To replace one of these lamps: 1. Open the liftgate. See Liftgate

(Manual) on page 2‑9 or Liftgate (Power) on page 2‑10.

2. Remove the interior trim access

panel.

A. Attachment Nuts B. Retaining Hook

3. Remove the five attachment nuts (A) securing the taillamp assembly to the liftgate.

4. Disengage the retaining hook (B)

and pull the taillamp assembly out of the vehicle liftgate.

5. Disconnect the lamp wiring

harness.

GMC Terrain Owner Manual (Include Mex) - 2012

Black plate (37,1)

Vehicle Care

10-37

9. Push the bulb socket in and turn

it clockwise.

10. Reverse Steps 2 through 5 to

reinstall lamp assembly.

Back–Up Lamp Removal of the lamp assembly is not required to replace the back-up lamp bulb. To replace one of these lamps: 1. Open the liftgate. See Liftgate

(Manual) on page 2‑9 or Liftgate (Power) on page 2‑10.

2. Remove the interior trim access

panel.

6. Turn the bulb socket

counterclockwise and pull it out.

7. Pull the bulb straight out of the

socket. Install the new bulb.

8.

3. Turn the bulb socket

counterclockwise and pull it out.

4. Pull the bulb straight out of the

socket. Install the new bulb.

5. 6. Push the bulb socket in and turn

it clockwise.

7. Reinstall the interior trim access

panel.

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Black plate (38,1)

10-38

Vehicle Care

License Plate Lamp To replace one of these bulbs: 1. Open the liftgate partway. See

Liftgate (Manual) on page 2‑9 or Liftgate (Power) on page 2‑10.

3. Pull the lamp assembly down to

5. Pull the bulb (B) straight out of

remove it from the liftgate.

the bulb socket.

6. Push the replacement bulb

straight into the bulb socket and turn the bulb socket clockwise to install into lamp assembly.

7. Turn the lamp assembly into the

liftgate engaging the clip side first.

8. Push on the lamp side opposite the clip until the lamp assembly snaps into place.

A. Bulb Socket B. Bulb C. Lamp Assembly

4. Turn the bulb socket (A)

counterclockwise to remove it from the lamp assembly (C).

Passenger Side Shown,

Driver Side Similar

2. Push the left end of the lamp

assembly toward the right.

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Vehicle Care

10-39

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. There are two fuse blocks in the vehicle: one in the engine compartment and one in the instrument panel. There is a fuse puller located in the engine compartment fuse block. See Engine Compartment Fuse Block on page 10‑40. It can be used to easily remove fuses from the fuse block.

Replacement Bulbs

Electrical System

Fuses The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of damage 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 to replace a bad fuse with a new one of the identical size and rating. Replace a bad fuse with a new one of the identical size and rating.

Exterior Lamp

Auxiliary Taillamp Back-Up Lamp Fog Lamp Headlamp High Beam Headlamp Low Beam

License Plate Lamp

Parking Lamp/ Turn Signal Front Sidemarker Front Taillamp/Turn Signal Lamp/Stop Lamp/Sidemarker

Bulb

Number

161
921LL H11

9005LL

H11

168LL

(W5WLL)

7444NA

194

3057K

For replacement bulbs not listed here, contact your dealer.

GMC Terrain Owner Manual (Include Mex) - 2012

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10-40

Vehicle Care

Engine Compartment Fuse Block

To remove the fuse block cover, squeeze the clips on the cover and lift it straight up. See Engine Compartment Overview on page 10‑6. Notice: Spilling liquid on any electrical component on the vehicle may damage it. Always keep the covers on any electrical component.

Engine Compartment Fuse Block

The vehicle may not be equipped with all of the fuses, relays, and features shown.

J-Case Fuses

Usage

Cool Fan 1
Cool Fan 2
Brake Booster

GMC Terrain Owner Manual (Include Mex) - 2012

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Vehicle Care

10-41

J-Case Fuses

Usage

J-Case Fuses

Usage

Mini Fuses

10

11

12

Power Windows – Right Memory Seat Module Power Seat – Left Instrument Panel Fuse Block 1
Rear Defogger Starter AIR Pump Motor Instrument Panel Fuse Block 2
Sunroof

13

14

15

16

Mini Fuses

17

18
19

Antilock Brake System Pump Instrument Panel Fuse Block 3
Power Windows – Left Antilock Brake System Module

Usage Transmission Control Module Battery Trailer Parking Light AIR Pump Solenoid

20

21

22

23
24

25

26

27

28

Usage Engine Control Module Battery Canister Vent Trailer Left Side (If Equipped) Lift Gate Module Power Lumbar Trailer Right Side (If Equipped) Rear Accessory Power Outlet Memory Mirror Module Regulated Voltage Control Battery Sensor

GMC Terrain Owner Manual (Include Mex) - 2012

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10-42

Vehicle Care

Mini Fuses

Usage

Mini Fuses

Usage

Mini Fuses

Usage

29
30

31

32
33
34

35

36

37
38
39

Front Wiper Rear Wiper Air Conditioning Compressor Rear Latch Heated Mirrors Horn Right High‐Beam Headlamp Left High‐Beam Headlamp Ignition Even Coil Ignition Odd Coil Windshield Washer

40

41

42

43

44

45

46

47

Front Fog Lamps Post Catalytic Converter Oxygen Sensor Engine Control Module Pre–Catalytic Converter Oxygen Sensor Transmission Control Module Mirror Chassis Control Module Ignition Spare

48

49

50

51

52

53

54

Rear Drive Module Lift Gate Module Logic Instrument Panel Fuse Block Ignition Heated Seat – Front Chassis Control Module Engine Control Module Rear Vision Camera

Midi Fuse

55

Usage Electric Power Steering

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Micro Relays

Usage

Micro Relays

Usage

Instrument Panel Fuse Block

Vehicle Care

10-43

56
57
58

59

60

61

62

AIR Pump Solenoid Brake Booster Cooling Fan Low Headlamp High Beam Cooling Fan Control Wiper On/Off Control Air Conditioning Compressor

63
64
65
66
67
68

Rear Defogger Wiper Speed Fog Lamp Engine Control Starter Run/Crank

Mini Relays

Usage

69
70

Cooling Fan High AIR Pump Motor

The instrument panel fuse block is located on the passenger side panel of the center console.

GMC Terrain Owner Manual (Include Mex) - 2012

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10-44

Vehicle Care

To access the fuses, open the fuse panel door from the passenger side by pulling it out. To reinstall the door, insert the tabs on the top of the door into the console first, then push the door back into its original location. The vehicle may not be equipped with all of the fuses, relays, and features shown.

Mini Fuses

Usage

10

11

Steering Wheel Dimming Spare Spare Body Control Module 1
Infotainment Body Control Module 7
Noise Control Module Body Control Module 4
Radio Special Equipment Order Battery Ultrasonic Rear Parking Assist Module

Instrument Panel Fuse Block

GMC Terrain Owner Manual (Include Mex) - 2012

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Vehicle Care

10-45

Mini Fuses

Usage

Mini Fuses

Usage

Mini Fuses

Usage

12

13

14

15

16

17

18

19

20

21

Heater, Ventilation and Air Conditioning Battery Auxiliary Power Front Heater, Ventilation and Air Conditioning Ignition Display Body Control Module 5
Auxiliary Power Rear Instrument Panel Cluster Ignition Personal Device Interface Module Body Control Module 6
Special Equipment Order Retained Accessory Power

22

23
24

25

26
27
28

30

31

32

33

34

Sensing and Diagnostic Module Ignition Spare Spare Transmission Gear Shift Position Indicator Spare Spare Spare Body Control Module 3
Amplifier Discrete Logic Ignition Switch Communications Integration Module Body Control Module 2

35

36

37

38

39

J‐Case Fuses

29

40

Relays

41

42

Sensing and Diagnostic Module Battery Data Link Connection Instrument Panel Cluster Battery Passenger Sensing System Module Spare

Usage

Front Blower Motor Body Control Module 8

Usage Logistic Relay (If Equipped) Retained Accessory Power Relay

GMC Terrain Owner Manual (Include Mex) - 2012

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10-46

Vehicle Care

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 9‑18.

(Continued)

WARNING (Continued)

WARNING (Continued)

. 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.

(Continued)

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

GMC Terrain Owner Manual (Include Mex) - 2012

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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.

Vehicle Care

10-47

(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 10‑63.

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Vehicle Care

(G) Maximum Cold Inflation Load Limit: Maximum load that can be carried and the maximum pressure needed to support that load.

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 regular road tire has lost air and gone flat. If the vehicle has a compact spare tire, see Compact Spare Tire on page 10‑75 and If a Tire Goes Flat on page 10‑67. (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. (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 10‑53.

GMC Terrain Owner Manual (Include Mex) - 2012

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(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.

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.

Vehicle Care

10-49

(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.