GMC Terrain: Bulb Replacement / Front Turn Signal Lamps
To replace one of these bulbs:
- Open the hood. See Hood.

- Remove the bulb access cap
from the top of the headlamp
assembly by turning it
counterclockwise.

- Remove the bulb from the bulb
socket by pinching the tabs on
either side of the bulb and pull
straight out.
- Install the new bulb in the bulb
socket.
- Install the bulb access cap onto
the headlamp assembly by
turning clockwise.
To replace one of these lamps:
Open the liftgate. See Liftgate.
Remove the two screw caps
and two screws from the
taillamp assembly.
Pull the taillamp assembly out
of the vehicle body...
Other information:
This light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally,
the indicator light turns off.
If the light is on and not flashing, the
TCS and potentially the StabiliTrak/
ESC system have been disabled...
Warning
Exhaust gases can enter the
vehicle if it is driven with the
liftgate or trunk/hatch open,
or with any objects that pass
through the seal between the
body and the trunk/hatch or
liftgate. Engine exhaust contains
carbon monoxide (CO) which
cannot be seen or smelled...