GM 91174688
Combination Lamp Assy

Start the tail lamp replacement by removing two screws from the tail lamp while gently moving the lamp backward to reach the sockets of all three bulb components. The turn signal lamp bulb socket comes off the tail lamp when twisted counterclockwise while you also need to remove the turn signal lamp bulb if present. Detach the back up lamp bulb by twisting its socket counterclockwise until it separates from the tail lamp. If necessary, take out the back up lamp bulb. Turn the tail/stop lamp bulb socket clockwise while continuing to pull it out from the tail lamp until it's free and remove any necessary tail/stop lamp bulb. Cut the power connection of the tail lamp before extracting the lamp from its vehicle position. To set the tail/stop lamp bulb in its socket first secure it by hand turning the socket clockwise into the tail lamp. You should repeat the procedure for swapping the back up lamp bulb and socket and the turn signal lamp bulb and socket. Reconnect the tail lamp electrical connector while you reinstall the tail lamp onto the vehicle using its 2 screws .