GM Service Manual Online
For 1990-2009 cars only
  1. Open the liftgate. See Liftgate/Liftglass .

  2. Object Number: 806155  Size: A3

    Remove the two screws from the taillamp assembly.

  3. Pull the taillamp assembly away from the vehicle.

  4. Object Number: 1819507  Size: B3
  5. Unclip the wiring harness (A) and remove the three retaining screws (B) from the socket plate.
  6. Remove the socket plate.
  7. Holding the socket, pull the bulb to release it from the socket.
  8. Push the new bulb into the socket until it clicks.
  9. Reinstall the socket and tighten the three screws.
  10. Reconnect the wiring harness.
  11. Reinstall the taillamp assembly by lining up the locator pins with the retainers in the vehicle's body.
  12. Reinstall the two screws and tighten.