GM Service Manual Online
For 1990-2009 cars only

Follow all state and local authority requirements for aiming headlamps.

Check the aim of the headlights when you replace a headlamp or a headlamp bulb. Replacement will not necessarily require aiming adjustment.

Sealed Beam Headlamps

Adjust the horizontal and the vertical aim of each headlamp by turning the 2 screws provided. The 2 screws move the mounting ring against the tension of a coil spring.

Composite Headlamps

Adjust the horizontal and the vertical aim of each headlamp by turning the 2 screws that are located at the top of the composite headlamp.

Open the hood in order to access the adjusting screws.

Turn the adjustment screws with a T15 Torx bit®.

Turn the inboard adjustment screw in order to adjust the headlamp vertically.

Turn the outboard adjustment screw in order to adjust the headlamp horizontally.