The problem is that, with increasing frequency, the air bags go flat over night after parking the Envoy at home. If it makes any difference, it’s an XUV model. The dealer has checked the fittings for leaks and found nothing. In fact, for the two days it sat at the dealership, the rear height changed only slightly up and down due to temperature changes. When I brought it home last Friday, I left the key on and stood on the rear bumper to force the leveling system to operate. Once I got off, it settled back to what seems to be the normal ride height. It stayed fine until Saturday evening when I drove it around town on an errand. I parked it this time and just turned key off. The next morning, it was down over two and a half inches on each side. Any ideas on what to look for? I know that it has 3 solenoid valves. One for each side, and one to relieve pressure when the pump starts. Any chance one of the bag valves is hanging partially open and deflating the system?
have the same problem?
Monday, September 15th, 2008 AT 11:03 PM