GM Service Manual Online
For 1990-2009 cars only

Center High-Mounted Stoplamp (CHMSL) With Spoiler

To change the bulb, do the following:

  1. Unscrew the bulb assembly from the spoiler.
  2. Gently pull out the bulb assembly.
  3. Remove the bulb(s) by gently wiggling the bulb(s) from the assembly.
  4. Replace the bulb(s) and reverse these steps to reinstall the bulb assembly.

Center High-Mounted Stoplamp (CHMSL) Without Spoiler

To change the bulb, do the following:

  1. Open the trunk and view the access hole under the rear shelf.
  2. Remove the bulb socket by twisting it in either direction, then pull down.
  3. Remove the bulb and replace it.
  4. Reinstall the bulb socket into the CHMSL.