GMC 2012 Sierra - Manual (Page 427)

Black plate (41,1) GMC Sierra Owner Manual - 2012 - CRC - 11/15/11
Vehicle Care 10-41
4. Install a new bulb into the
socket, turn it clockwise, and
press it in until it is tight.
5. Reinstall the lens and the four
screws.
Taillamps, Turn Signal,
Stoplamps, and Back-Up
Lamps
A. Stoplamp/Taillamp/Turn
Signal Lamp
B. Back-up Lamp
To replace one of these bulbs:
1. Open the tailgate. See Tailgate
on page 2‑10 for more
information.
2. Remove the two rear lamp
assembly screws near the
tailgate latch strikerpost and pull
rearward until disengaging the
two outer pins on the taillamp
assembly from the vehicle.
3. Turn the bulb socket
counterclockwise to remove
it from the taillamp assembly.
4. Pull the old bulb straight out
from the socket.
5. Press a new bulb into the
socket and turn the socket
clockwise into the taillamp
assembly.
6. Reinstall the taillamp
assembly.