GM Service Manual Online
For 1990-2009 cars only

Fog Lamp Aiming Fog Adjust

Check tyre pressures and adjust if necessary.


Object Number: 2019496  Size: MF

Adjustment is carried out at the vehicle curb weight with a person weighing 75 kg (165 lb) in the driver's seat. See procedure "Check and Adjust Headlamps". Adjust fog lamps with the adjusting screw (arrow) to the upper light/dark boundary line using an adjuster. The light/dark boundary line here runs horizontally along the setting line. The tilt of the fog lamps is 20 cm (7.9 in) over 10 m (33 ft) (corresponds to a tilt of 2%).

Fog Lamp Aiming Base

Preparation Procedure

Note: Horizontal aim is not adjustable on this vehicle. Vertical aim is done by an adjusting nut located on the rear of the 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. 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.
  4. Adjust the fog lamp as required using the adjusting screw above the projector lens on the outside of the front bumper fascia.
  5. Turn OFF the fog lamps.