How do you replace a tail light bulb in a 1996 GMC Sierra pickup?

To replace a tail light bulb in a 1996 GMC Sierra pickup, first, open the tailgate and locate the tail light assembly. Remove the screws or bolts securing the tail light assembly and gently pull it out. Twist the bulb socket counterclockwise to remove it, then replace the old bulb with a new one, ensuring it is securely in place. Finally, reinsert the socket, attach the tail light assembly back to the vehicle, and test the new bulb to ensure it works.