Hi, The temp at the vents on my 07 Trailblazer with the 4.2 engine is a little warmer than I would wish. It has been this way since it was new. The vent temp is about 44 degrees with the compressor cycling. I would like to bring this down about 5 degrees, it's hot in Florida. Is there a low pressure cutoff that I might adjust or is this done through the ECM?
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