GM Service Manual Online
For 1990-2009 cars only

The high intensity discharge (HID) visual optical aiming type headlamps have been preset at the factory and should need no further adjustment. If the headlamps need to be re-aimed, it is recommended to see your dealer/retailer for service. However, it is possible to re-aim the headlamps as described in the following procedure.

Notice: To make sure the headlamps are aimed properly, read all the instructions before beginning. Failure to follow these instructions could cause damage to headlamp parts.

The vehicle should be properly prepared as follows:

    • The vehicle should be placed so the headlamps are 25 ft (7.6 m) from a light colored wall.
    • The vehicle must have all four tires on a perfectly level surface which is level all the way to the wall.
    • The vehicle should be placed so it is perpendicular to the wall.
    • The vehicle should not have any snow, ice, or mud attached to it.
    • The vehicle should be fully assembled all other work stopped while headlamp aiming is being done.
    • The vehicle should be normally loaded with a full tank of fuel and one person or 160 lbs (75 kg) on the driver seat.
    • The tires should be properly inflated.
    • Start the vehicle and rock it to level the suspension.

Headlamp aiming is done with the low-beam headlamps. The high-beam headlamps are correctly aimed if the low-beam headlamps are aimed properly.


Object Number: 1215869  Size: A2

The headlamp aiming device is under the hood near the headlamps.