Ride Height Adjustments

Ride Height Adjustments





WARNING: Vent all air pressure from the air suspension system prior to disconnecting or removing any air suspension components. It is dangerous to remove air suspension components while under pressure. Failure to follow this instruction may result in serious personal injury.

NOTICE: The suspension height D dimensions are for reference only. The vehicle suspension height position must be controlled by the correct dimensions to prevent vehicle damage.

NOTE: Improper air suspension ride height D dimension can be caused by an air suspension system that is incorrectly adjusted.

NOTE: The ride height D dimension is the distance between the rear axle and the vehicle frame.

1. Position the vehicle on a level surface over an open repair pit.

2. Open the luggage compartment and verify that the air suspension switch is in the ON position.

3. Turn the ignition switch to the RUN position and wait at least 2 minutes.

4. Position the Ride Height Dimension "D" Gauge on the rear axle.





5. Measure the ride height D dimension.

1. Release the set screw.

2. Pull the sliding post and scale up until it touches the bottom of the inboard frame rail and lock the set screw.

3. Measure the ride height D dimension.





6. If ride height dimension D is not within specification, use the scan tool to vent or fill the air suspension to the correct dimension.





7. NOTE: Vehicle Dynamics Module (VDM) is programmed to identify a reading of 2.80 volts as suspension trim height.

Using the scan tool, monitor the VDM rear height sensor voltage (HGTSNVOLT) PID.

- If the PID displays 2.80 volts, the ride height is OK at this time.

- If the PID displays something other than 2.80 volts, continue to the next step.

8. Loosen the height sensor bracket nuts.





9. Slide the bracket until the HGTSNVOLT PID displays 2.80 volts.





10. Tighten the height sensor bracket inner nuts to 11 Nm (97 lb-in) and the outer nuts to 12 Nm (106 lb-in).