GMC Sierra 2008, Owner'S Manual, Page: 456 / 578

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 Bulb (CHMSL)
2. Remove the bulbs by turning socket
counterclockwise and pulling the bulb straight out.
3. Install the bulbs by pushing the bulb straight in and
turning clockwise.
4. Reinstall the lamp assembly and tighten the screws.
Pickup Box Identification and
Fender Marker Lamps
To replace a pickup box identification or fender marker
lamp bulb:
1. Press the tab from the back to remove the lamp.
2. Unplug the lamp assembly harness.
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