GM Service Manual Online
For 1990-2009 cars only

Center High-Mounted Stoplamp (CHMSL) Hatchback

To replace a CHMSL bulb on a hatchback model:

  1. Open the liftgate. See Liftgate for more information.

  2. Object Number: 1625999  Size: B3
  3. Pry off the trim from the liftgate and remove the two screws.
  4. Remove the bulb socket from the lamp housing.
  5. Remove the bulb by pulling it straight out of the bulb socket.
  6. Install the new bulb.
  7. Reverse Steps 1 through 3 to reinstall the lamp assembly.

Center High-Mounted Stoplamp (CHMSL) Wagon

To replace a CHMSL bulb on a wagon model:

  1. Open the liftgate. See Liftgate for more information.

  2. Object Number: 1626001  Size: B3
  3. Remove the two screws and the liftgate trim cover.
  4. Remove the bulb socket from the lamp housing.
  5. Remove the bulb by pulling it straight out of the bulb socket.
  6. Install the new bulb.
  7. Reinstall the liftgate trim cover and secure with the two screws to secure.