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 MANUALSCHEVROLET2001CHEVY EXPRESS G2500, VAN CARGO EXTENDED, 5.7 R, L31/KL8REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 370 (ELECTRONIC SUSPENSION SYSTEM - AUTOMATIC LEVEL CONTROL)DIAGNOSTIC INFORMATION AND PROCEDURESAIR COMPRESSOR LEAK TESTTOOLS REQUIRED
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8
Tools Required
2001 Chevrolet Chevy Express G2500, Van Cargo Extended, 5.7 R, L31/KL8SECTION Tools Required
WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
- 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 - Replace the air compressor head if leaking.
- Air dryer to compressor head O-ring - Replace the air dryer if leaking.
- Air dryer cover - Replace the air dryer if leaking.
- Air compressor head gasket - Replace the air compressor head if leaking.
- Air compressor head cover gasket - Tighten the cover bolts to 5.6 N.m (50 in lbs) if the head cover gasket is leaking. If the leak persists, replace the air compressor head.
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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.