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Headlamp Aiming Procedure

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Open the hood.
  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. Fig 1: Measuring Distance Between Headlamp Aiming Screen & Headlamp
    G01712476Courtesy of GENERAL MOTORS CORP.
  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.

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

  8. Turn on the low beam headlamps and block the light from projecting onto the screen from the passenger side headlamp.
  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 (1) 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.
  13. This illustration represents the Visual Optics Left (VOL) pattern.
  14. This illustration represents the Visual Optics Right (VOR) pattern.
  15. This illustration represents all headlamps, except the VOL and VOR.
  16. This illustration represents the high beam pattern for all headlamps, including VOL and VOR.
    Fig 2: High Beam Pattern For All Headlamps Including VOL & VOR
    G01712477Courtesy of GENERAL MOTORS CORP.
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