Question about 1993 GMC Rally

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I get a funny sound when i switch on the AC, and when the compresser is on

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Watch the belt on the a/c compressor see if it is real loose when a/c is on, also watch the front clutch on the compressor.... have someone in the truck turn the a/c on & off while you watch the action of the coompressor clutch may be going bad and if it is yiou will see it dragging and wobbling, unfortunately the clutches are no longer replaced alone...they come installed on a reman compressor, I guess they were too much trouble so now they are replaced as a unit.

Posted on Aug 24, 2010

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