engine GMC TERRAIN 2012 Repair Manual

Black plate (60,1)GMC Terrain Owner Manual (Include Mex) - 2012
9-60 Driving and Operating
Parking on Hills
{WARNING
Parking the vehicle on a hill with
the trailer attached can be
dangerous. If something goes
wrong, the rig could start to move.
People can be injured, and both
the vehicle and the trailer can be
damaged. When possible, always
park the rig on a flat surface.
If parking the rig on a hill:
1. Press the brake pedal, but do not shift into P (Park) yet. Turn
the wheels into the curb if facing
downhill or into traffic if facing
uphill.
2. Have someone place chocks under the trailer wheels.
3. When the wheel chocks are in place, release the brake pedal
until the chocks absorb the load. 4. Reapply the brake pedal. Then
apply the parking brake and shift
into P (Park).
5. Release the brake pedal.Leaving After Parking on a Hill
1. Apply and hold the brake pedal.
2. Start the engine.
3. Shift into a gear.
4. Release the parking brake.
5. Let up on the brake pedal.
6. Drive slowly until the trailer is clear of the chocks.
7. Stop and have someone pick up and store the chocks.
Maintenance When Trailer
Towing
The vehicle needs service more
often when pulling a trailer. See this
manual's Maintenance Schedule or
Index for more information. Things
that are especially important in
trailer operation are automatic
transmission fluid, engine oil, axle lubricant, belts, cooling system and
brake system. Inspect these before
and during the trip.
Check periodically to see that all
hitch nuts and bolts are tight.
Engine Cooling When Trailer
Towing
The cooling system may temporarily
overheat during severe operating
conditions. See
Engine Overheating
on page 10‑20.
Trailer Towing
Before pulling a trailer, there are
three important considerations that
have to do with weight:
.The weight of the trailer
.The weight of the trailer tongue
.The total weight on the vehicle's
tires

Black plate (61,1)GMC Terrain Owner Manual (Include Mex) - 2012
Driving and Operating 9-61
Weight of the Trailer
How heavy can a trailer safely be?
Speed, altitude, road grades,
outside temperature, special
equipment, and the amount of
tongue weight the vehicle can carry
must be considered. See“Weight of
the Trailer Tongue” later in this
section for more information.
Maximum trailer weight is calculated
assuming only the driver is in the
tow vehicle and it has all the
required trailering equipment. The
weight of additional optional
equipment, passengers and cargo in
the tow vehicle must be subtracted
from the maximum trailer weight.
Use the following chart to determine
how much the vehicle can weigh,
based upon the vehicle model and
options. Vehicle
Maximum Trailer
Weight with Trailer Brakes† GCWR*
2.4 L L4 Engine, FWD 680 kg (1,500 lbs) 2 625 kg (5,787 lbs)
2.4 L L4 Engine, AWD 680 kg (1,500 lbs) 2 700 kg (5,952 lbs)
3.0 L V6 Engine, FWD 1 588 kg (3,500 lbs) 3 600 kg (7,937 lbs)
3.0 L V6 Engine, AWD 1 588 kg (3,500 lbs) 3 700 kg (8,157 lbs)
† For trailers without trailer brakes the maximum trailer weight is 454 kg
(1,000 lbs). See Towing Equipment on page 9‑63 for more information.
*The Gross Combination Weight
Rating (GCWR) is the total
allowable weight of the completely
loaded vehicle and trailer including
any passengers, cargo, equipment
and conversions. The GCWR for the
vehicle should not be exceeded.
Ask your dealer for our trailering
information or advice. See
Customer Assistance Offices (U.S.
and Canada) on page 13‑4 or
Customer Assistance Offices
(Mexico) on page 13‑5 for more
information.
Weight of the Trailer Tongue
The tongue load (A) of any trailer is
an important weight to measure
because it affects the total gross
weight of the vehicle. The Gross
Vehicle Weight (GVW) includes the
curb weight of the vehicle, any
cargo carried in it, and the people
who will be riding in the vehicle.

Black plate (63,1)GMC Terrain Owner Manual (Include Mex) - 2012
Driving and Operating 9-63
Towing Equipment
Hitches
Use the correct hitch equipment.
See your dealer or a hitch dealer for
assistance.
.The rear bumper on the vehicle
is not intended for hitches. Do
not attach rental hitches or other
bumper-type hitches to it. Use
only a frame-mounted hitch that
does not attach to the bumper.
.Will any holes be made in the
body of the vehicle when the
trailer hitch is installed? If there
are, seal the holes when the
hitch is removed. If the holes are
not sealed, dirt, water, and
deadly carbon monoxide (CO)
from the exhaust can get into the
vehicle. SeeEngine Exhaust on
page 9‑28.
Safety Chains
Always attach chains between the
vehicle and the trailer. Cross the
safety chains under the tongue of
the trailer to help prevent the tongue
from contacting the road if it
becomes separated from the hitch.
Leave enough slack so the rig can
turn. Never allow safety chains to
drag on the ground.
Trailer Brakes
Does the trailer have its own
brakes? Be sure to read and follow
the instructions for the trailer brakes
so they are installed, adjusted, and
maintained properly.
Because the vehicle has antilock
brakes, do not tap into the vehicle's
brake system. If this is done, both
brake systems will not work well,
or at all.
Trailer Sway
Control (TSC)
The vehicle has a Trailer Sway
Control (TSC) feature as part of the
StabiliTrak system. If TSC detects
that the trailer is swaying, the
vehicle's brakes are automatically
applied.
When TSC is applying the brakes,
the TCS/StabiliTrak indicator light
flashes to notify the driver to reduce
speed. If the trailer continues to
sway, StabiliTrak will reduce engine
torque to help slow the vehicle.
TSC will not function if StabiliTrak is
turned off. See StabiliTrak
®System
on page 9‑36 for more information.

Black plate (1,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-1
Vehicle Care
General Information
General Information . . . . . . . . . . 10-2
California Proposition65 Warning . . . . . . . . . . . . . . . . . 10-3
California Perchlorate Materials Requirements . . . . 10-3
Accessories and Modifications . . . . . . . . . . . . . . . 10-3
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 10-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . 10-6
Engine Cover . . . . . . . . . . . . . . . . 10-9
Engine Oil . . . . . . . . . . . . . . . . . . 10-10
Engine Oil Life System . . . . . 10-12
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . 10-13
Engine Air Cleaner/Filter . . . . 10-14
Cooling System . . . . . . . . . . . . 10-15
Engine Coolant . . . . . . . . . . . . . 10-17
Engine Overheating . . . . . . . . 10-20
Power Steering Fluid (2.4L L4 Engine) . . . . . . . . . . . . . . . . 10-22 Power Steering Fluid (3.0L
V6 Engine) . . . . . . . . . . . . . . . . 10-22
Washer Fluid . . . . . . . . . . . . . . . 10-23
Brakes . . . . . . . . . . . . . . . . . . . . . 10-23
Brake Fluid . . . . . . . . . . . . . . . . . 10-24
Battery . . . . . . . . . . . . . . . . . . . . . 10-26
All-Wheel Drive . . . . . . . . . . . . . 10-26
Starter Switch Check . . . . . . . 10-27
Automatic Transmission Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . 10-27
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . 10-28
Park Brake and P (Park) Mechanism Check . . . . . . . . 10-28
Wiper Blade Replacement . . . . . . . . . . . . . . 10-28
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . 10-30
Bulb Replacement
Bulb Replacement . . . . . . . . . . 10-32
Headlamps, Front TurnSignal, Sidemarker, and
Parking Lamps . . . . . . . . . . . . 10-32
Fog Lamps . . . . . . . . . . . . . . . . . 10-33 Taillamps, Turn Signal,
Sidemarker, Stoplamps,
and Back-Up Lamps . . . . . . 10-34
License Plate Lamp . . . . . . . . 10-36
Replacement Bulbs . . . . . . . . . 10-37
Electrical System
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-38
Engine Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-38
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . . . 10-42
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-44
Tire Sidewall Labeling . . . . . . 10-45
Tire Designations . . . . . . . . . . . 10-47
Tire Terminology andDefinitions . . . . . . . . . . . . . . . . 10-48
Tire Pressure . . . . . . . . . . . . . . . 10-51
Tire Pressure Monitor System . . . . . . . . . . . . . . . . . . . 10-52
Tire Pressure Monitor Operation . . . . . . . . . . . . . . . . . 10-54
Tire Inspection . . . . . . . . . . . . . . 10-57
Tire Rotation . . . . . . . . . . . . . . . 10-57
When It Is Time for New Tires . . . . . . . . . . . . . . . . . . . . . . 10-58
Buying New Tires . . . . . . . . . . . 10-59

Black plate (3,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-3
California Proposition
65 Warning
Most motor vehicles, including this
one, contain and/or emit chemicals
known to the State of California to
cause cancer and birth defects or
other reproductive harm. Engine
exhaust, many parts and systems,
many fluids, and some component
wear by-products contain and/or
emit these chemicals.
California Perchlorate
Materials Requirements
Certain types of automotive
applications, such as airbag
initiators, seat belt pretensioners,
and lithium batteries contained in
Remote Keyless Entry transmitters,
may contain perchlorate materials.
Special handling may be necessary.
For additional information, see
www.dtsc.ca.gov/hazardouswaste/
perchlorate.
Accessories and
Modifications
Adding non‐dealer accessories or
making modifications to the vehicle
can affect vehicle performance and
safety, including such things as
airbags, braking, stability, ride and
handling, emissions systems,
aerodynamics, durability, and
electronic systems like antilock
brakes, traction control, and stability
control. These accessories or
modifications could even cause
malfunction or damage not covered
by the vehicle warranty.

Black plate (6,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-6 Vehicle Care
Engine Compartment Overview
2.4L L4 Engine

Black plate (7,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-7
A.Engine Air Cleaner/Filter on
page 10‑14.
B. Engine Cover on page 10‑9.
C. Engine Oil Dipstick (Out of View). See Engine Oil on
page 10‑10.
D. Engine Oil Fill Cap. See Engine
Oil on page 10‑10.
E. Brake Fluid Reservoir. See Brakes on page 10‑23. F.
Engine Compartment Fuse
Block on page 10‑38.
G. Remote Positive (+) Terminal. See Jump Starting on
page 10‑76.
H. Remote Negative (−) Terminal. See Jump Starting on
page 10‑76.
I. Battery on page 10‑26 (Out
of View). J. Engine Coolant Surge Tank and
Pressure Cap. See Engine
Coolant on page 10‑17.
K. Windshield Washer Fluid Reservoir. See Washer Fluid on
page 10‑23.

Black plate (8,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-8 Vehicle Care
3.0L V6 Engine

Black plate (9,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-9
A.Engine Air Cleaner/Filter on
page 10‑14.
B. Power Steering Fluid Reservoir (Under Engine Cover). See
Power Steering Fluid (2.4L L4
Engine) on page 10‑22 or
Power Steering Fluid (3.0L
V6 Engine) on page 10‑22.
C. Engine Oil Fill Cap. See Engine
Oil on page 10‑10.
D. Engine Cover on page 10‑9.
E. Engine Oil Dipstick (Out of View). See Engine Oil on
page 10‑10.
F. Brake Fluid Reservoir. See Brakes on page 10‑23. G.
Engine Compartment Fuse
Block on page 10‑38.
H. Remote Positive (+) Terminal. See Jump Starting on
page 10‑76.
I. Remote Negative (−) Terminal. See Jump Starting on
page 10‑76.
J. Battery on page 10‑26 (Out
of View).
K. Engine Coolant Surge Tank and Pressure Cap. See Engine
Coolant on page 10‑17.
L. Windshield Washer Fluid Reservoir. See Washer Fluid on
page 10‑23.Engine Cover
Engine Cover 3.0L V6
A. Oil Fill Cap
B. Engine Cover Bolt
C. Engine Cover
To remove:
1. Remove the oil fill cap (A).
2. Remove the engine cover bolt (B).
3. Raise the engine cover (C) to release from the retainers.

Black plate (10,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-10 Vehicle Care
4. Lift and remove the enginecover.
5. Reverse Steps 1 through 4 to reinstall engine cover.
Engine Oil
To ensure proper engine
performance and long life, careful
attention must be paid to engine oil.
Following these simple, but
important steps will help protect
your investment:
.Always use engine oil approved
to the proper specification and of
the proper viscosity grade. See
“Selecting the Right Engine Oil”
in this section.
.Check the engine oil level
regularly and maintain the
proper oil level. See “Checking
Engine Oil” and“When to Add
Engine Oil” in this section.
.Change the engine oil at the
appropriate time. See Engine Oil
Life System on page 10‑12.
.Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
It is a good idea to check the engine
oil level at each fuel fill. In order to
get an accurate reading, the vehicle
must be on level ground. The
engine oil dipstick handle is a yellow
loop. See Engine Compartment
Overview on page 10‑6 for the
location of the engine oil dipstick.
Obtaining an accurate oil level
reading is essential:
1. If the engine has been running recently, turn off the engine and
allow several minutes for the oil
to drain back into the oil pan.
Checking the oil level too soon
after engine shutoff will not
provide an accurate oil level
reading. 2. Pull out the dipstick and clean it
with a paper towel or cloth, then
push it back in all the way.
Remove it again, keeping the tip
down, and check the level.
When to Add Engine Oil
2.4L L4 Engine
3.0L V6 Engine
If the oil is below the cross-hatched
area at the tip of the dipstick, add
1 L (1 qt) of the recommended oil
and then recheck the level. See
“Selecting the Right Engine Oil” in
this section for an explanation of