Air suspension can get quite expensive when parts fail. Be sure to check these faults early on before other components become defective. Today’s Real Fix of the Day is an example of a level control exhaust valve fault.
2008, Chevrolet Tahoe, 5.3
C0660, Replaced Level Ride Compressor Assembly
The customer states the service ride control light is on.
Connected a scan tool and found code C0660 - Level Control Exhaust Valve Circuit. Performed a visual inspection of the exhaust valve solenoid and found the valve leaked when turned off. Used the scan tool to command the exhaust valve solenoid on and used a test light to check for power and ground at the exhaust valve solenoid. The testing verified both power and ground were present. Used a multi-meter to measure resistance of the exhaust valve solenoid and found the measured resistance was greater than the maximum specified value of 45 ohms. The exhaust valve solenoid is integrated into the level ride compressor assembly and is replaced as an entire unit.
Replaced the level ride compressor assembly, cleared codes, performed a road test and verified the vehicle operated properly. The service ride control light did not illuminate and no fault codes returned.
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