Document ID# 1618897
2004 HUMMER H2
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Suspension Position Calibration
This procedure noted below should be performed after compressor assembly, air suspension control module, or suspension position sensor replacement. Uneven suspension position can also be corrected by performing this procedure.
Tools Required
CH-47816 Suspension Position Calibration Blocks
Important: Before proceeding with the steps below, ensure:
• There are no stored diagnostic trouble codes stored in the ASCM.
• The vehicle is on level ground.
• There are no occupants in the vehicle.
• The tire pressures are at the recommended kPa/psi.
Raise the vehicle on a hoist.
Install the CH-47816 on to the LR and RR jounce bumper mounting cups.
Lower the vehicle off the hoist.
Depressurize the air suspension system in order to allow the full rear weight of the vehicle to rest on the blocks and rear axle. Refer to Air Suspension Depressurization Procedure .
Turn ON the ignition, with the engine OFF.
Install a scan tool.
With the scan tool select Chassis.
Select Air Suspension.
Select Special Functions.
Select Trim Height Calibration and press the Enter key. The scan tool will flash Calibration In Progress, then display Calibration Complete.
Press the Exit key.
Pressurize the air suspension system until the rear weight of the vehicle is lifted of the blocks. Refer to Air Suspension Pressurization Procedure .
Remove the CH-47816 .
Cycle the ignition switch Off then start and run the engine for 2 minutes. Verify the Air Suspension system is functioning properly.
The only trick is to set the vehicle an inch higher than what the blocks hold it at, before you push recalibrate trim height on the scan tool. Everyone understand now?
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