GM Service Manual Online
For 1990-2009 cars only

To replace the headlamp bulbs, do the following:

  1. Turn the front wheels as far as they will go in the opposite direction of the bulb that is being changed.
  2. Reach underneath the vehicle and locate the headlamp door. Remove the fastener retaining the door.

  3. Object Number: 949425  Size: B3
  4. Turn the bulb socket counterclockwise to remove it from the headlamp assembly.
  5. There are separate sockets for the high and low-beam headlamps.

  6. Pull the bulb socket out of the headlamp assembly.

  7. Object Number: 949427  Size: B3
  8. Disconnect the bulb socket from the wiring harness and replace the unit.
  9. Reinstall the bulb socket back into the headlamp assembly by turning it clockwise.
  10. Reinstall the headlamp cover and tighten the fastener.