Automatic Leveling System Failure on Buick Riviera

Average mileage: 88,000 (88,000–88,000)
1 model year affected: 1999
1 person reported this problem
1 person shared problem details
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 a 1998 and two 1999s and all three have had this problem.
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