failed rear end on 2004 buick rainer on 2004 Buick Rainier

the rear end of my buick, will not lift. what will cause this and does it have anything to do with the awd?

Asked by for the 2004 Buick Rainier
same problem
1 more answer
No, it is probably the air compressor for the rear shocks. I had the same problem & this is what my mechanic told me.