1.) P0443 is Evaporative Emission control system purge valve circuit malfunction. By the way, it is the number "0" and not the letter "O". Did you properly hook up your EVAP system? Not many people do when they do LSX swaps. If that is the case, do as skeet recommended and turn it off in the tune. If you don't know what EVAP is than you do NOT have it and you should turn it off in the tune.
2.) Is there any voltage at the compressor when you command it to come on at the a/c head unit?
Last edited by r6z4o6; 05-09-2008 at 04:37 PM.
1991 Silverado ECLB
LM7-T56
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