2003 GMC Yukon Owner's Manual - Page 416

1. Use a tool to remove the two screws from the lamp assembly. 4. Pull the old bulb straight out from the socket. 2. Remove the lamp assembly. 3. Press the release tab and turn the bulb socket counterclockwise to remove it from the taillamp housing. 5. Press a new bulb into the socket, insert the socket into the taillamp housing and turn the socket clockwise into the taillamp housing until it clicks. 6. Reinstall the rear lamp assembly. 5-58