GMC 2011 Sierra Denali, Owner'S Manual, Page: 380 / 492

10-36 Vehicle Care
Center High-Mounted
Stoplamp (CHMSL) and
Cargo Lamp
To replace one of these bulbs:
1. Remove the screws and lift off
the lamp assembly.
A. Cargo Lamp
B. Center High-Mounted
Stoplamp (CHMSL) Bulb
2. On the back side of the
lamp assembly, remove the
bulb socket by turning it
counterclockwise 1/4 turn and
pulling it straight out.
3. Remove the bulbs by pulling the
bulb out of the socket.
4. Install the bulbs by pushing the
bulb straight into the socket.
5. Install the bulb socket back into
the lamp assembly by turning it
clockwise 1/4 turn into the
assembly.
6. Reinstall the lamp assembly and
tighten the screws.