GM Service Manual Online
For 1990-2009 cars only
  1. Follow Steps 1 through 3 under Headlamps to remove the headlamp assembly
  2. Reach down into the space provided by the removal of the headlamp assembly and, while pushing in the tab on the bulb assembly, turn the assembly counterclockwise and remove it.
  3. Remove the old bulb by pulling it straight out of the retainer.
  4. Install the new bulb and turn the bulb assembly back into place.