2007 GMC Sierra 1500 Pickup Owner's Manual - Page 541

License Plate Lamp To replace one of these bulbs, do the following: 1. Reach under the rear bumper for the bulb socket. Replacement Bulbs Exterior Lamp Back-up Lamp Back-up Lamp* Cargo Lamp and Center High-Mounted Stoplamp (CHMSL) Daytime Running Lamp (DRL) Fender Marker, Front Roof Marker, and Sidemarker Lamp (If Equipped) Front Parking and Turn Lamp Headlamps High-Beam Low-Beam License Plate Lamp Rear Marker Lamp, Taillamp and Stoplamp* Rear Turn Signal Lamp Rear Turn Signal Lamp* Stoplamp and Taillamp* * Chassis Cab Models Bulb Number 3157 1156 912 4114K 194 3457A 9005 9006 168 3157 3157 1156 1157 2. Turn the bulb socket counterclockwise and pull the bulb socket out of the connector. 3. Pull the old bulb from the bulb socket, keeping the bulb straight as you pull it out. 4. Install the new bulb. 5. Reverse Steps 1 through 3 to reinstall the bulb socket. For replacement bulbs not listed here, contact your dealer. 541