Below is the aiming proceedure for an Envoy. Please ask if you have further questions.
The screen method requires an area set up specifically for headlamp aiming.
The area should consist of a level surface large enough to allow for a vehicle and an additional 7.62 m (25 ft) as measured from the face of the headlamps to the aiming screen.
The screen should be a wall or other flat surface at least 1.52 m (5 ft) high by 3.66 m (12 ft) wide with a matte white surface well shaded from extraneous light, and 90 degrees to the floor. The screen should be provided with a permanent vertical reference line 0.61 m (2 ft) from the left edge of the screen, 2 laterally adjustable vertical tapes, and one vertically adjustable horizontal tape.
After the aiming screen has been set up and located, paint or tape a reference line on the floor 15.24 m (50 ft) from the vertical reference line on the screen. This line should be perpendicular to the aiming screen and a mark placed at 7.62 m (25 ft) from the screen.
The graphic shows a GMC headlamp. Chevrolet is similar.
The graphic shows a GMC headlamp, Chevrolet is similar.
Adjust the headlamps to the specifications required by state and local authorities.
Important: Do not place a cover directly on the headlamp assembly while the headlamp is ON.
The following list refers to the callouts in the graphic: