Suspension Control ( Automatic - Electronic ): Adjustments

Ride Height Adjustments

CAUTION: This procedure is to adjust the ride height only. It should not be carried out unless a specific ride height deviation from nominal exists. Do not run this test in preparation for alignment. The accurate trim test under diagnostic test modes on the scan tool should be used to attain nominal ride height prior to alignment.

Note: This procedure should be carried out after rear air suspension height sensor, vehicle dynamic module, or a rear air suspension height sensor attachment bracket is repaired or replaced. Also, this procedure should be used in the instance of customer complaint for ride height leans and other complaints.

1. Note: Vehicle should be on a level surface.

Turn the ignition switch to RUN position.

2. Note: Make sure the air suspension switch is ON.

Configure scan tool for correct model year vehicle, Vehicle Dynamic Module.

3. Select Function Test selection on scan tool menu.

4. Note: The scan tool will command the vehicle to go to its nominal ride height. While this is happening, the scan tool will display "RUNNING ACCURATE TRIM TEST".

Prepare the vehicle as specified on the scan tool screen.





5. Note: The nominal wheel lip opening will be displayed until a different number is entered by the operator. No adjustment will occur if nominal values are entered.

Measure each rear wheel lip opening to the bottom of the rim.
6. Enter each value measured into the scan tool and allow it to complete calibration.





7. Remeasure each rear wheel lip opening for nominal height.

8. Note: If the proper wheel lip openings are not attainable by running this procedure, the air suspension height sensor ball studs will require adjustment to attain the desired wheel lip opening.

Rerun Ride Height Adjustments procedure if the ball stud adjustment was made.