2011 Chevrolet Express 1500 Cargo Owner's Manual - Page 312

10-42 Vehicle Care 2. Remove the CHMSL assembly. 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. A. Bulb Socket B. License Plate Bulb Assembly C. Screws Center High-Mounted Stoplamp (CHMSL) The Center High-Mounted Stoplamp (CHMSL) is located above the rear doors at the center of the vehicle. To replace a bulb: License Plate Lamp To replace one of these bulbs: 1. Remove the two screws from the CHMSL assembly.