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Thanks for the feedback.. Gage pressure was 100PSi Checked all fuses and relays, all were good. We put power to a/c unit and grounded out. Did It with engine off and ignition switch off. I'll try and find the pressure cycling switch this evening. Thanks again Ken

Hi, My 2001 Tahoe A/C has worked flawlessly for all 112K miles since I purchased. I went on vacation for two weeks. When I returned, she started right up but the A/C doesn't seem to cool anymore. All the control functions seem to be working (fans, LED's, temp controls) but no cold air anymore...