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 5 m (16 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. Object Number: 1379959  Size: SH
  5. Adjust the beam f the fog lamp by rotating the adjusting screw (1) clockwise to lower the beam and counterclockwise to raise the beam.

  6. Object Number: 1379958  Size: SH
  7. Individually aim each fog lamp to a point on its vertical center line (3), with the cut-off line (2) 100 mm (4 in) (A) below the fog lamp horizontal center line (1).
  8. Turn OFF the front fog lamps.