2010 GMC TERRAIN Owner's Manual

Vehicle Care 9-23
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
an accident. When the brake
wear warning sound is heard,
have the vehicle serviced.
Notice: Continuing to drive with
worn-out brake pads could result
in costly brake repair. Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake pads for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications in
Capacities and
Specifications on page 11‑2.
Brake linings should always be
replaced as complete axle sets.
Brake Pedal Travel
See your dealer/retailer if the brake
pedal does not return to normal
height, or if there is a rapid increase
in pedal travel. This could be a
sign that brake service might be
required.
Brake Adjustment
Every time the brakes are applied,
with or without the vehicle moving,
the brakes adjust for wear.
Replacing Brake System Parts
The braking system on a vehicle is
complex. Its many parts have to be
of top quality and work well together
if the vehicle is to have really good
braking. The vehicle was designed
and tested with top-quality brake
parts. When parts of the braking
system are replaced, 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.

9-24 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 9‑6for 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 4‑19.
What to Add
Use only new DOT 3 brake fluid
from a sealed container. See
Recommended Fluids and
Lubricants on page 10‑7.
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.

Vehicle Care 9-25
Notice:
.Using the wrong fluid can
badly damage brake
hydraulic system parts. For
example, just a few drops of
mineral-based oil, such as
engine oil, in the brake
hydraulic system can
damage brake hydraulic
system parts so badly that
they will have to be replaced.
Do not let someone put in
the wrong kind of fluid.
.If brake fluid is spilled on
the vehicle's painted
surfaces, the paint finish can
be damaged. Be careful not
to spill brake fluid on the
vehicle. If you do, wash it off
immediately.
Battery
Refer to the replacement number on
the original battery label when a
new battery is needed.
{DANGER
Battery posts, terminals, and
related accessories contain lead
and lead compounds, chemicals
known to the State of California to
cause cancer and reproductive
harm. Wash hands after handling.
Vehicle Storage
{WARNING
Batteries have acid that can burn
you and gas that can explode.
You can be badly hurt if you are
not careful. See Jump Starting
on
page 9‑78
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.

9-26 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.
SeeScheduled Maintenance
on
page 10‑2.
How to Check Lubricant
To get an accurate reading, the
vehicle should be on a level
surface. If the level is below the bottom of
the filler plug hole, located on the
transfer case, you will need to add
some lubricant. Add enough
lubricant to raise the level to the
bottom of the filler plug hole. A fluid
loss could indicate a problem; check
and have it repaired, if needed.
What to Use
Refer to the Maintenance Schedule
to determine what kind of lubricant
to use. See
Recommended Fluids
and Lubricants on page 10‑7.
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.
1. Before starting this check, be sure there is enough room
around the vehicle.
2. Firmly apply both the parking brake and the regular brake.
See Parking Brake
on
page 8‑40.
Do not use the accelerator
pedal, and be ready to turn off
the engine immediately if it
starts.

Vehicle Care 9-27
3. Try to start the engine in eachgear. The vehicle should start
only in P (Park) or N (Neutral).
If the vehicle starts in any other
position, contact your dealer/
retailer for service.
Automatic Transmission
Shift Lock Control
System 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 8‑40.
Be ready to apply the regular
brake immediately if the vehicle
begins to move.
3. With the engine off, turn the ignition to ON/RUN, 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/retailer 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/retailer if
service is required.

9-28 Vehicle Care
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.
.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/retailer if
service is required.
Wiper Blade Replacement
Windshield wiper blades should be
inspected for wear and cracking.
See Scheduled Maintenance
on
page 10‑2for 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 10‑9.
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.

Vehicle Care 9-29
Front Wiper Blade
Replacement
To replace the front wiper blades:
1. Lift the wiper arm from thewindshield until no further
movement is possible.
2. Press the square button on thetop side, at the end of the wiper
arm, and pull the wiper blade out
of the end of the wiper arm. 3. 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.
4. Place the wiper arm with the wiper blade in place back on the
windshield.
Rear Wiper Blade Replacement
To replace the rear wiper blade:
1. Lift the wiper arm from theliftgate glass until no further
movement is possible.
2. Hold the wiper arm at the tip with one hand and hold the
wiper blade at the tip with the
other hand. 3. Pull down on the wiper blade.
The blade will pull away from
the arm.
4. Place the wiper blade into the
wiper arm aligning the blade
attachment rivet with the arm
attachment.

9-30 Vehicle Care
5. Align the wiper blade with thearm and hold both ends of the
arm while gently squeezing until
the blade snaps into place.
Do not apply excessive force
during this operation.
Reposition the blade in the arm
and repeat, if blade is not
correctly positioned.
6. Place the wiper arm with the wiper blade attached back on
the liftgate glass.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/
retailer 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.
.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.