GM Service Manual Online
For 1990-2009 cars only

To replace the center high-mounted stoplamp bulb:

  1. The bulb is on the inside of the liftgate/liftglass near the top.
  2. Remove the two clips from both sides of the cover, then remove it.

  3. Object Number: 1450558  Size: G1
  4. Remove the two screws to remove the housing to expose the bulb.

  5. Object Number: 1820853  Size: G1
  6. Turn the bulb socket counterclockwise and pull it out.
  7. Pull the bulb straight out of the socket.
  8. Reverse the previous steps to install a new bulb.