2010 GMC TERRAIN Owner's Manual

Vehicle Care 9-31
To adjust the vertical aim, do the
following:
1. Open the hood. SeeHood
on
page 9‑5for more information.
2. Locate the aim dot on the lens of the low‐beam headlamp.
3. Measure the distance from the ground to the aim dot on the
low‐beam headlamp. Record the
distance.
4. At the wall, measure from the
ground 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.

9-32 Vehicle Care
7. Locate the vertical headlampaiming screws, which are under
the hood near each headlamp
assembly.
The adjustment screw can be
turned with a E8 Torx
®socket.
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.
Bulb Replacement
For the proper type of replacement
bulbs, see Replacement Bulbson
page 9‑38.
For any bulb changing procedure
not listed in this section, contact
your dealer/retailer.

Vehicle Care 9-33
Headlamps, Front Turn
Signal, Sidemarker, and
Parking Lamps
A. Low-Beam Headlamp
B. High-Beam headlamp
C. Side Marker Lamp
D. Park/Turn Signal LampTo replace:
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 screw (A) and turn the access port cap (B)
counterclockwise to remove.
3. If replacing a low/high headlamp bulb, remove the dust cover cap
from the back of the headlamp
housing by turning the cap
counterclockwise. 4. Turn the low/high beam or
park/turn signal bulb socket
counterclockwise to remove from
the lamp assembly.
5. Turn the sidemarker bulb socket clockwise to remove from the
lamp assembly.
6. Remove the bulb from the socket or disconnect bulb
assembly from harness
connector.
7. Install new bulb.
8. Reinstall the low/high beam or park/turn signal bulb socket to
the lamp assembly, turning
clockwise.
9. Reinstall the sidemarker bulb socket to the lamp assembly,
turning clockwise.
10. Replace the dust cover cap on headlamps.
11. Reinstall the wheel well cover access port cap and secure by
installing screw.

9-34 Vehicle Care
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
counterclockwise to lock it into
place.
5. Reconnect the bulb socket to the electrical connector.
Taillamps, Turn Signal,
Sidemarker, Stoplamps,
and Back-Up Lamps
A. Stop/Tail/Turn Signal/Sidemarker Lamp
B. Auxiliary Taillamp
C. Back-up Lamp

Vehicle Care 9-35
Stop/Tail/Turn Signal/
Sidemarker Lamp
To replace one of these lamps:
1. Open the liftgate. SeeLiftgate
(Manual)
on page 1‑8or
Liftgate (Power) on page 1‑9.
A. Screw
B. Screw Cover
2. Remove the two screw covers (B) from the taillamp
assembly. 3. Remove the two screws (A)
securing the taillamp assembly.
4. Pull 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 lamp assembly.
11. Verify that the taillampassembly tab, located at
the bottom of the taillamp
assembly, is aligned to the
facia bracket before securing
with screws.

9-36 Vehicle Care
Auxiliary Taillamp
To replace one of these lamps:
1. Open the liftgate. SeeLiftgate
(Manual)
on page 1‑8or
Liftgate (Power) on page 1‑9.
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 vehicle liftgate.
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 lamp assembly.
Back–Up Lamp
Removal of the lamp assembly is
not required to replace
back-up lamp.
To replace one of these lamps:
1. Open the liftgate. See Liftgate
(Manual)
on page 1‑8or
Liftgate (Power) on page 1‑9.
2. Remove the interior trim access panel.

Vehicle Care 9-37
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 (Manual)
on page 1‑8orLiftgate (Power)on
page 1‑9.
Passenger side shown,
driver side similar
2. Push the left end of the lamp assembly towards the right.
3. Pull the lamp assembly down to remove from liftgate.
A. Bulb Socket
B. Bulb
C. Lamp Assembly
4. Turn the bulb socket (A) counterclockwise to remove from
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.

9-38 Vehicle Care
7. Turn the lamp assembly into theliftgate 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 921
Fog Lamp H11
Headlamp
High Beam HB3Exterior Lamp
Bulb
Number
Headlamp
Low Beam H11
License Plate Lamp 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/retailer.
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.
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 9‑39. It can be used
to easily remove fuses from the fuse
block.