2011 GMC Terrain Air conditioning trouble
3 Answers
The A/C unit requires no small portion of the entire power output of your engine at idle - we may be talking about up to 30%. If part of the A/C system isn't working right - worn out compressor, low freon charge, who knows - this power requirement may be even greater. Combine that with an older, more tired engine (or at least, one that might need plugs and a fuel system cleanup) and the switch from "idle" to "time to accelerate" is quite a change.
BritishTech77 answered 6 years ago
Like cometguy61 said. Go with the most obvious the compressor. How I would diagnose it is have it running and open hood and listen for the rough sound. Sometimes if you put your ear to a screwdriver you will hear it if touched on item
My a/c in my 2010 GMC terrain will not turn on at times. If I turn the power button off and on ,it will start up,most of the time. Its blowing hard and cold,when it does. What could it be?
