GM Service Manual Online
For 1990-2009 cars only

Horizontal aim is not adjustable on this vehicle. Vertical aim is done by an adjusting nut located on the rear of the fog lamp.


    Object Number: 313853  Size: SH
  1. Ensure that all components are back in their original place if any service has been performed on the vehicle.
  2. Place the vehicle on a level surface.
  3. Ensure that the fuel tank is half full.
  4. If the vehicle is intended for hauling heavy loads or to tow a trailer, simulate these loads.
  5. Move the vehicle to a level area and park the vehicle approximately 7.6 m (25 ft) away from the target screen (5).
  6. Measure from the center of the fog lamp to the ground line.
  7. Turn the fog lamps ON.
  8. Ensure that the top of the fog beam image on the target screen is approximately 101.6 mm (4 in) below the center of the fog lamp lens height (8).

  9. Use the adjusting nut on the rear of the fog lamp in order to adjust the fog lamp as needed.