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Home >> Hummer >> 2008 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 409 (Suspension Control System - Suspension Leveling) >> Diagnostic Information and Procedures >> Automatic Level Control System Leak Test >> Leak Test Procedure

Leak Test Procedure

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the air tube from the air dryer.
  2. Attach the air tube to the J 22124-B  on the side opposite the toggle valve.
  3. Close the toggle valve.
  4. Apply service air pressure to the service valve and pressurize until the J 22124-B  reads 550 kPa (80 psi).
  5. Verify that the system maintains pressure for at least 1 minute.
    • If the system does not maintain the specified pressure for the specified amount of time, check the shock absorber air sleeves, air tubes, and all connections for air leaks using a soapy water solution. Repair or replace any leaking components. Refer to Air Tube Replacement  and Shock Absorber Replacement .
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