Ride Height Adjustments (Vehicle Dynamic Suspension)

Ride Height Adjustments





CAUTION: The suspension ride height dimensions are for reference only. The vehicle attitude must be controlled by the correct dimensions to prevent vehicle damage.

NOTE: If one or both height sensors are installed new, both height sensors must be calibrated.

NOTE: Incorrect air suspension ride height can be caused by an air suspension system that is incorrectly set.

NOTE: The air suspension module has a preprogrammed trim height.

1. NOTE: The vehicle must be on a level surface, such as a drive on alignment hoist.

Position the vehicle on a level surface.
2. Using the vehicle message center, verify that the air suspension is in the ON mode. For additional information, refer to Air Suspension System Disable/Enable.
3. Using the scan tool, run the accurate trim test.
4. Measure the ride height.
5. If the ride height is not within specification, use the scan tool to vent or fill the air suspension to the correct dimension.





6. NOTE: The air suspension height sensor sends a signal to the air suspension module. The output ranges from approximately 4.5 volts at minimum height (when the vehicle is low or in full jounce) to 0.5 volt at maximum height (when the vehicle is in high or in full rebound).

Using the scan tool, monitor the 2 suspension height sensors voltage PIDs.
7. Using the scan tool, save the vehicle's trim height for both sensors.