Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1355 (SUSPENSION CONTROL SYSTEM - AUTOMATIC LEVEL CONTROL)DIAGNOSTIC INFORMATION AND PROCEDURESAIR COMPRESSOR LEAK TEST
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6
Air Compressor Leak Test
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Air Compressor Leak Test
WARNING: This page is about a different car, the 2008 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required
- J 22124-B Pressure Gage (0-300 psi)
- J 22124-91 Pressure Gage Adapter
- Attach the J 22124-91 pressure gage adapter to the air dryer.
- Attach the J 22124-B pressure gage to the J 22124-91 pressure gage adapter with the toggle valve on the opposite side of the air compressor. Close the toggle valve.
- Apply air pressure at the schrader valve. Pressurize until the J 22124-B pressure gage reads 690 kPa (100 psi).
- Check the following areas using soap bubbles:
- Solenoid valve
- Air dryer to compressor head O-ring
- Air dryer cover
- Air compressor head gasket
- Air compressor head cover - If necessary, tighten the cover bolts to 5.6 N.m (50 lb in)
If a leak is found, replace the air compressor. Refer to Air Compressor Replacement .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.