The auto level ride compressor may fail causing the rear of the vehicle to ride to high or too low.
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The leveling system air compressor head has a relief valve in it that corrodes and sticks over time. Each time the car is started, the compressor should cycle to pressurize the system and then the release pressure as needed to establish level. The condition becomes apparent when the rear of the car raises a little at a time until the air shocks are destroyed, requiring replacement of the rear shocks and the air compressor head. I have owned ...