2009 GMC Envoy Owner's Manual - Page 350

Back-Up Lamps The back-up lamps are located in the rear bumper. To replace a bulb: 4. Unclip the wiring harness (A) and remove the three socket retaining screws (B). 5. Remove the socket plate. 6. Holding the socket, pull the bulb to straight out release it from the socket. 7. Push the new bulb into the socket until it clicks. 8. Reinstall the socket plate and three screws. 9. Reconnect the wiring harness. 10. Reinstall the taillamp assembly by lining up the locator pins with the retainers in the body of the vehicle. 11. Reinstall the two screws. 5-48 1. Reach behind the rear bumper and locate the bulb socket. 2. Turn it counterclockwise to remove from the lamp assembly. 3. Holding the socket, pull the old bulb to release it from the socket. 4. Push in a new bulb into the bulb socket until it clicks. 5. Reinstall the bulb socket into the lamp assembly and turn it clockwise to secure.