2001 GMC Sierra 1500 Pickup Owner's Manual - Page 392

Taillamps (Chassis Cab Models) A. Turn Signal Lamp B. Stoplamp C. Back-up Lamp 3. Press the release tab and turn the bulb socket counterclockwise to remove it from the taillamp housing. 4. Pull the old bulb straight out from the socket. 5. Press a new bulb into the socket and turn the socket clockwise into the taillamp housing until it clicks. 6. Reinstall the rear lamp assembly and tighten the screws. 7. Close the tailgate. 1. Using your hands, peel the rubber seal away from the lens. 2. Lift the lens off the lamp assembly. 3. Pull the old bulb straight out from the socket. 4. Put a new bulb into the socket and press it in until it is tight. 5. Reinstall the lens and the lens seal. 6-50