A friend of my complained about the A/C with his Chevy 2500 HD. Dealer in Calif. could not fix it, so he took it back to AZ where he bought it. Apparently, the A/C systems are really "picky" and turned out his was "over charged" Dealer said the pressure has to be exactly as specified or won't work correctly. Once the system was set at the correct pressures, it worked perfectly in Palm Springs, CA. Might have your dealer check your system.
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