1995 GMC Sonoma Owner's Manual - Page 252

3. Holding the base of the bulb, pull the bulb straight out of the socket. 4. Push the new bulb into the socket until clicks. it 5. Put the socket back into the parking/turn signal lamp assembly turn and it clockwise until locks in place. it Rear Lamps 1. Open the tailgate. 2. Remove the screws from the lamp assembly near the tailgate latch. Pull out the assembly. 3. Pull the assembly away from the pickup side panel. 4. Turn the socket counterclockwise to removeit. Push thetab in while you turn the socket.