GM Service Manual Online
For 1990-2009 cars only

Fog Lamp Aiming Base

Preparation Procedure

Important: Horizontal aim is not adjustable on this vehicle. Vertical aim is done by adjusting the allen screw at the top outside of the front fog lamp. Prior to aiming the fog lamps, perform the following steps:

  1. Completely assemble all of the components on the vehicle.
  2. Place the vehicle on a level surface.
  3. Stop all unnecessary operations or work that could affect the ride height of the vehicle.
  4. Close the doors and verify that the luggage compartment is empty.
  5. Stabilize the suspension by rocking the vehicle sideways.
  6. Ensure that the fuel level is full.
  7. Ensure that the tires are inflated to the proper pressure.
  8. Ensure that the driver or a similar weight , approximately 75 kg (165 lb), is in the vehicle driver seat.

Aiming Procedure


    Object Number: 276650  Size: SH
  1. Park the vehicle 7.6 m (25 ft) away from the target screen.
  2. Measure from the center of the fog lamp to the ground line. Using this measurement, mark the horizontal centerline (2) of the fog lamp on the target screen directly in front of the vehicle.
  3. The adjustment hole is located in the front fascia just above the fog lamp assembly.
  4. Turn ON the fog lamps. The top of the fog lamp beam image (4) on the target screen should be 102 mm (4 in) below the center of the fog lamp lens height.
  5. Adjust the fog lamp as required using the allen adjusting screw located at the top outside of the fog lamp.
  6. Turn OFF the fog lamps.