2011 Chevrolet Silverado 1500 Regular Cab Owner's Manual - Page 452

10-46 Vehicle Care 2. On the reverse side of the lamp assembly, remove the bulb socket by turning it one quarter turn counterclockwise and pull it straight out. 3. Remove the bulb by pulling it straight out of the socket. 4. Install the bulb by pushing the bulb straight into the socket. 5. Install the bulb socket into the lamp asembly by turning it one quarter turn clockwise. 6. Reinstall the lamp assembly and tighten the screws. Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp To replace one of these bulbs: License Plate Lamp To replace one of these bulbs: 1. Reach under the rear bumper for the bulb socket. 1. Remove the two screws and lift off the lamp assembly. 2. Turn the bulb socket counterclockwise and pull the bulb socket out of the lamp assembly. 3. Pull the old bulb straight out from the bulb socket. 4. Install the new bulb. 5. Reverse Steps 1 and 2 to reinstall the bulb socket. A. Cargo Lamp B. Center High-Mounted Stoplamp (CHMSL) Bulb