Question about 2003 GMC Yukon XL
The earlier GM trucks had a problem with the a/c systems
Compressors are junk, but this will usually break the a/c belt, and make a horrible noise right before that.
the pressure you have listed is not much help, there is a high and low side pressure. If they are both the same, then the compressor is not on or is not pumping (broke). The early yukons/suburbans/tahoes also had a problem with the a/c cycling switch. If yours has a brown band, replace it.
At Idle (depending on outside temp) Low pressure should be about 40 psi at idle and high side about 220....again this can change greatly by outside temp.
Another thing you may want to look at is of course a leak in the system, make sure its fully charged, and check the fan clutch.
Posted on Aug 07, 2009
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Posted on Jan 02, 2017
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