2012 GMC TERRAIN Owner's Manual

Black plate (31,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-31
4. At the wall, measure from theground upward (A) to the
recorded distance from
Step 3 and mark it.
5. Draw or tape a horizontal line (B) 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.
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.
9. Make sure that the light from theheadlamp 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.

Black plate (32,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-32 Vehicle Care
Bulb Replacement
For the proper type of replacement
bulbs, seeReplacement Bulbs on
page 10‑37.
For any bulb changing procedure
not listed in this section, contact
your dealer.
Headlamps, Front Turn
Signal, Sidemarker, and
Parking Lamps
A. Low-Beam Headlamp
B. High-Beam Headlamp
C. Sidemarker Lamp
D. Park/Turn Signal Lamp 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. 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.

Black plate (33,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-33
4. Turn the bulb socketcounterclockwise to remove it
from the lamp assembly.
5. Remove the bulb from the socket or disconnect the bulb
assembly from the harness
connector.
6. Install the new bulb.
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.Fog Lamps
To replace one of these bulbs:
1. Locate the fog lamp assemblyunder 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.
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.

Black plate (34,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-34 Vehicle Care
Taillamps, Turn Signal,
Sidemarker, Stoplamps,
and Back-Up Lamps
A. Stop/Tail/Turn Signal/Sidemarker Lamp
B. Auxiliary Taillamp
C. Back-up Lamp
Stop/Tail/Turn Signal/
Sidemarker Lamp
To replace one of these lamps:
1. Open the liftgate. See Liftgate
on page 2‑9.
2. Remove the two screw covers from the taillamp assembly.
3. Remove the two screwssecuring the taillamp assembly.
4. Pull the taillamp assembly out of the vehicle body.
5. Disconnect the lamp wiring harness.
6. Turn the bulb socketcounterclockwise and pull it out.
7. Pull the bulb straight out of the socket.
8. Install the new bulb.
9. Push the bulb socket in and turn it clockwise.
10. Reverse Steps 2 through 5 to reinstall the lamp assembly.

Black plate (35,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-35
11. Verify that the taillampassembly 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
on page 2‑9.
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.6. Turn the bulb socket
counterclockwise and pull it out.
7. Pull the bulb straight out of the socket.
8. Install the new bulb.
9. Push the bulb socket in and turn it clockwise.
10. Reverse Steps 2 through 5 to reinstall lamp assembly.

Black plate (36,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-36 Vehicle Care
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. SeeLiftgate
on page 2‑9.
2. Remove the interior trim access panel.
3. Turn the bulb socketcounterclockwise and pull it out.
4. Pull the bulb straight out of the socket.
5. Install the new bulb.
6. Push the bulb socket in and turn it clockwise.
7. Reinstall the interior trim access panel.
License Plate Lamp
To replace one of these bulbs:
1. Open the liftgate partway. SeeLiftgate on page 2‑9.
Passenger Side Shown, Driver
Side Similar
2. Push the left end of the lamp assembly toward the right.
3. Pull the lamp assembly down to remove it from the liftgate.

Black plate (37,1)GMC Terrain Owner Manual (Include Mex) - 2012
Vehicle Care 10-37
A. Bulb Socket
B. Bulb
C. Lamp Assembly
4. Turn the bulb socket (A) counterclockwise to remove it
from the lamp assembly (C).
5. Pull the bulb (B) straight out of 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.
Replacement Bulbs
Exterior Lamp Bulb
Number
Auxiliary Taillamp 161
Back-Up Lamp 921LL
Fog Lamp H11
Headlamp
High Beam 9005LL
Headlamp
Low Beam H11Exterior Lamp
Bulb
Number
License Plate Lamp 168LL
(W5WLL)
Parking Lamp/Turn
Signal Front 7444NA
Sidemarker Front 194
Taillamp/Turn Signal
Lamp/Stop Lamp/
Sidemarker 3057K
For replacement bulbs not listed
here, contact your dealer.

Black plate (38,1)GMC Terrain Owner Manual (Include Mex) - 2012
10-38 Vehicle Care
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.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 10‑38. It can be used
to easily remove fuses from the fuse
block.
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.