2000 GMC Sierra 1500 Pickup Owner's Manual - Page 345

yellowblue Taillamps (Pickup Models) 1. Open the tailgate. 2. Remove the two rear lamp assembly screws near the tailgate latch and pull out the lamp assembly. 4. If a CHMSL bulb is replaced, put the bulb into the socket and press it in until it is tight. 5. If a cargo lamp is replaced, put a new cargo lamp bulb into the socket and press it in until it is tight before turning the socket counterclockwise. 6. Put the bulb holder back plate into the lamp housing. 7. Replace the lamp assembly and tighten the screws. 6-42