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Home >> Chevrolet >> 2001 >> Impala Base, 3.8 K >> Repair and Diagnosis >> External Pages >> Different car >> Section 504 (Lighting Systems) >> Repair Instructions >> Headlamp Aiming >> Headlamp Aiming Procedure

Headlamp Aiming Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. 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.
  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.
    Fig 1: Measuring Headlamp Distances
    G01830603Courtesy of GENERAL MOTORS CORP.
  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.
    Fig 2: Driver Side Low Beam Projection Area
    G01830604Courtesy of GENERAL MOTORS CORP.
  9. Adjust the horizontal aim screw (1) and vertical aim screw (4) of the headlamps to the specifications required by the state and the local authorities, or as shown in step number 8.
  10. Repeat the aiming procedure for the passenger side headlamp while blocking the light from projecting onto the screen from the driver side headlamp.
  11. Turn the headlamps OFF.
  12. Close the hood.
    Fig 3: Adjusting Horizontal Aim Screw & Vertical Aim Screw Of Headlamps
    G01830605Courtesy of GENERAL MOTORS CORP.