2004 6.0 NV4500 Tahoe

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OR VietVet

GMT800 SUV/Trucks
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I hate to think it and say it but I have seen where when all else is eliminated, it turns out to be a leak at the evaporator. I did not see a thread about your a/c problems but has that been looked at? Not that you can see it till you rip it out of there.
 

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