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Headlamp Aiming Procedure

  1. Open the hood.
    2. Fig 1: Measuring Distance Between Headlamps Face & Aiming Screen
    GM418400Courtesy of GENERAL MOTORS COMPANY
  2. Measure from the floor to the center of the headlamp bulb, some headlamps have an aim dot marked on the headlamp lens.
  3. At the screen, measure from the floor and place the horizontal tape at the measured distance.
  4. Measure from the reference line on the floor to the left headlamp bulb centerline.
  5. At the screen, measure from the reference line and place the vertical tape at the measured distance.
  6. Measure from the reference line on the floor to the right headlamp bulb centerline.
  7. At the screen, measure from the reference line and place the vertical tape at the measured distance.
    8. NOTE:

    Do not cover the headlamp, this may cause excessive heat build up.

    Fig 2: Identifying Right Side Low Beam Proper Screen Positioning
    GM476831Courtesy of GENERAL MOTORS COMPANY
  8. Turn on the low beam headlamps and block the light from projecting onto the screen from the passenger side headlamp.
    9. NOTE:

    Horizontal headlamp adjustment does not exist.

  9. Adjust the vertical aim of the headlamps to the specifications required by the state and the local authorities, or as shown in step number 8.
  10. Rotate the headlamp adjuster to change the vertical aim of the headlamp.
  11. Repeat the aiming procedure for the passenger side headlamp while blocking the light from projecting onto the screen from the driver side headlamp.
  12. Close the hood.
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