GMC 2002 Yukon XL Owner's Manual page 366

Taillamps
A. Turn Signal Lamp
-
B. Back up Lamp
C. Stoplamp
1. Use a tool to remove the
two screws from the
lamp assembly.
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.
4. Pull the old bulb straight
out from the socket.
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