Dazed and Confused
Join Date: May 2012
Location: Upstate New York
Re: 2009 Mariner AC issue
Let me ask a few basics first, did you charge to the suction while running? If pressure went up, but the clutch never kicked in, you may have a safety holding it out or blown a fuse. If there is power to the clutch, you may have a failed clutch. Knowing the pressures on the high and low side would be handy as well.
Ever notice that there's so many high performance parts available for GM products?
Did you ever think that maybe they NEED them?