GM Service Manual Online
For 1990-2009 cars only

The Center High-Mounted Stoplamp (CHMSL) is located above the rear doors at the center of the vehicle.

To replace a bulb:


    Object Number: 1551911  Size: B2
  1. Remove the two screws from the CHMSL assembly.
  2. Remove the CHMSL assembly.
  3. Turn the bulb counterclockwise one quarter turn to remove it from the socket.
  4. Turn the bulb clockwise one quarter turn to install it in the socket.
  5. Reinstall the CHMSL assembly and two screws.

Do not block or damage the CHMSL when items are loaded on the roof of the vehicle.