GM Service Manual Online
For 1990-2009 cars only

The front fog lamps must be aimed for proper illumination of the road. The front fog lamp aim should be checked when a new front fog lamp assembly is installed, or if service or repairs in the front end area may have disturbed the front fog lamp mounting.

There is no horizontal adjustment for aiming the front fog lamp assemblies on this vehicle.

  1. To ensure accurate vertical front fog lamp aiming, first perform the following steps to prepare the vehicle.
  2. • Ensure that all the components are in place on the vehicle, if other service has been performed on the vehicle.
    • Ensure the fuel level is full.
    • Place the vehicle on a level surface 1.52 m (5 ft) away from a target screen.
    • Stop all other operations of work on the vehicle.
    • Jounce the vehicle to settle the suspension.
    • Cover the headlamps while aiming the fog lamps.
  3. Turn the front fog lamps ON.
  4. The adjuster screw is adjusted through a small hole located in the front portion of the wheelhouse liner and the adjustment screw head points downward towards the hole in the wheelhouse liner.

  5. Object Number: 64604  Size: SH
  6. Adjust the fog lamps up or down until the top edge of the high intensity zone on the screen is 102 mm (4 in) below the horizontal centerline (2), within the range of 0 mm (0 in) (3) to 203 mm (8 in) (5), below the horizontal centerline, on the target screen.
  7. Turn OFF the front fog lamps.