GMC 2012 Savana Owner's Manual page 290

3. Turn the bulb socket
counterclockwise one quarter
turn to remove it from the lamp
assembly.
4. Pull the old bulb straight out of
the socket and push the new
bulb into the socket.
5. Turn the bulb socket clockwise
one quarter turn to install it in the
lamp assembly.
6. Reinstall the CHMSL assembly
and two screws.
Do not block or damage the CHMSL
when items are loaded on the roof
of the vehicle.
To replace one of these bulbs:
A. Bulb Socket
B. License Plate Bulb Assembly
C. Screws
1. Remove the screws (C) that
secure the license plate bulb
assembly (B).
2. Turn the bulb socket (A)
counterclockwise and pull the
bulb straight out of the socket.
3. Install the new bulb.
4. Reverse steps 1 and 2 to
reinstall the license plate bulb
assembly.
Back-up, Rear
Parking, Stoplamp,
and Turn
Signal Lamp
Center
High Mounted
Stop Lamp
(CHMSL)
Front Parking and
Turn Signal Lamp
Front
Sidemarker Lamp
License
Plate Lamp
3157KX
912LL
3157KX
194LL
194LL