GM Service Manual Online
For 1990-2009 cars only

To replace a taillamp or rear turn signal bulb, do the following:

  1. Open the tailgate. See Tailgate for more information.

  2. Object Number: 1283922  Size: A3

    Remove the two screws from the taillamp assembly.

  3. Pull the taillamp assembly away from the vehicle.

  4. Object Number: 1283920  Size: A3
  5. Unclip the wiring harness (B).
  6. Remove the socket (rear turn signal lamp (A) or brake lamp (C)) by rotating it counterclockwise.
  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. Reverse Steps 1 through 5 to reinstall the lamp assembly.