2003 GMC Safari Owner's Manual - Page 278

4. Press the tab and turn the socket counterclockwise to remove the socket from the bezel. If the socket does not have a tab, turn the socket counterclockwise to remove the socket from the bezel. Replacement Bulbs 5. Remove the old bulb from the socket and replace it with a new one. 6 . Reverse Steps 1 through 4 to reinstall the taillamp. 5-6 1