2006 GMC Envoy Owner's Manual - Page 408

Back-Up Lamps The back-up lamps are located in the rear bumper. To replace a bulb, do the following: Replacement Bulbs Exterior Lamp Back-up Lamps Front Sidemarker Lamps Front Turn Signal Lamps Halogen Headlamps High-Beam Low-Beam Rear Turn Signal, Stoplamp and Taillamp Bulb Number 3157 194 3457 9005 HB3 9006 HB4 3057 For replacement bulbs not listed here, contact your dealer. 1. Reach behind the rear bumper and locate the bulb socket. 2. Turn it counterclockwise to remove from the bulb assembly. 3. Pull the bulb from the bulb socket. 4. Push in a new bulb into the bulb socket. 5. Reinstall the bulb socket by lining up the tabs in the lamp assembly and turn it clockwise to secure it. 5-52