How do you replace rear turn signal bulb on GMC savana?

To replace the rear turn signal bulb on a GMC Savana, first, open the rear doors and locate the tail light assembly. Remove the screws or clips securing the assembly, then gently pull it away from the vehicle. Twist the bulb socket counterclockwise to remove it, replace the old bulb with a new one, and reassemble by reversing the steps. Make sure to test the new bulb before securing everything back in place.