A few weeks ago I posted a problem with my Buick Park Avenue 2001. The struts extended out to their max. range after I had it on a lift to rotate the tires. No one could figure out what the fix would be. It seems one of valves stuck open causeing the problem. I took it to a local garage and asked them look at it. A young man 18 years old after looking at it and could find no damage to the system or anything that looked out of place, predicted it would possible level out, if it were a stuck valve after we lowered the lift. He was right. It worked. No charge. Sooo, if anyone out their ever has this problem, before spending a lot money. give this a try.