Electronic Level Ride System May Fail on Cadillac Seville STS

The electronic level ride system may not work properly; this may result in the rear of the vehicle riding too high or too low. Our technicians tell us that a height sensor or exhaust valve failure are common issues with this system. Proper diagnoses will be necessary to confirm the exact fault.

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Average mileage: 112,666 (97,000–130,110)
11 model years affected: 1990, 1991, 1992, 1993, more1994, 1995, 1996, 1997, 1998, 1999, 2002
17 people reported this problem
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problem details
1992 Cadillac Seville STS 120,000 mi,
Always had service ride control message displayed since i bought the car. Just made the car ride stiff. I replaced the front struts with generic non road sensing ones. I replace the back with aftermarket air struts. Works great now! Do this repair yourself! Just rent the spring compressor from autozone for free. There is a detailed how to online with pics too.
1992 Cadillac Seville STS 97,000 mi,
suspension is to high. how do i adjust it?
1992 Cadillac Seville STS 103,556 mi,
The Service suspenion msg has been on since I bought it. I changed the rear shocks (after market) the sensor was not attached to the shock. I installed it on the lower support. Light was still on. Had them run the codes and the results were a slow data flow for the turn leveling system. I am guessing a corroded connection or a wire has been rubbed on something. They were going to charge me $80.00 an hour to trace down the problem with a OHM meter. Not! I found the wiring diagram and plan to trace it myself. Has anyone dealt with this issue? I dread crawling around under there with a bad back and neck injury.