GM Service Manual Online
For 1990-2009 cars only

This procedure is for the liftgate-mounted taillamps and back-up lamps. To replace one of these bulbs, do the following:

  1. Open the liftgate. See Liftgate for more information.
  2. Remove the panel inside the liftgate by lifting the tabs and pulling the panel off.

  3. Object Number: 809866  Size: A3
  4. Remove the seven wing nuts and the four outboard nuts (two at each end).
  5. Gently lower the liftgate.
  6. Pull the lamp assembly directly rearward from the vehicle.

    1. Object Number: 806557  Size: B3

      Outboard Taillamp

      Center Taillamp

      Inboard Back-Up Lamp

  7. Turn the bulb socket counterclockwise one-quarter of a turn.
  8. Pull the bulb assembly out from the lamp housing.
  9. Pull the bulb out of the base.
  10. Install the new bulb into the electrical connector. Push the bulb firmly enough so that the tabs hook over the tab on the bulb.
  11. Put the bulb assembly back into the lamp housing and turn the bulb socket clockwise one-quarter of a turn.
  12. Reinstall the lamp assembly on the liftgate.
  13. Gently lift the liftgate.
  14. Reinstall the seven wing nuts and the four outboard nuts.
  15. Reinstall the panel inside the liftgate by connecting the tabs.
  16. Close the liftgate.