Question about 2002 GMC Sierra

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Intermitten A?C Problem on my 2001 GMC Silverado

I Have a 2001 GMC Sierra 4.8lL V8 1500. I've been having a problem that has been going off and on for 3 years now. My A/C works great most of the time, but now and then (becoming for frequent) it will just stop blowing cold air. I can be driving down the road for 20 minutes or so everything is fine then all of a sudden it will stop working without warning. Sometimes it will reset after a short period of time, and then sometimes it takes a few hours. I have tried turing it off and on and messing with all the controls, but it just resets and starts working in it's own time. Any help would be great! Thanks

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There should be a few things that has gone bad but were going to go with the low on R143a for now. Do not get a recharge kit like everyone uses, Call around and get quotes to getting your a/c recharged, on thing they will use a gauge on the high and low side which would indicate a problem with the a/c system to low on R143a to a bad orifice tube or a a/c compressor going bad. The low and high side should read 80 to 105psi with the clutch not engaged. when the clutch is engaged the low side should be 25 to 35psi and the high side should be 200 to 350psi any thing different would give you a poor a/c system Good luck ad keep me posted.

Posted on Jun 29, 2009

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Posted on Jan 02, 2017

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