How do I replace the rear air ride suspension compressor on my 2004 buick rainie on 2004 Buick Rainier

or is their a cheaper, or easier alternative?

Asked by for the 2004 Buick Rainier
its in rt rear quarter panel. remove protective plate and its right there
1 more answer
If the compressor has failed likely the rear air bags were you might consider installing a new coil spring conversion kit.