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2011 GMC Sierra 1500 Texas Edition Air-Conditioning

Patsy J Lander

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Patsy J Lander New Member

Patsy J Lander

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We have a 2011 GMC Sierra 1500, Texas Edition pick up that the air will blow like 60 degrees, then in a few minutes, it blows 80 degrees. Then back to 60, then back up again. We are at a loss as to wht is causing this. Any help??

2017SierraSLT Senior Enthusiast

2017SierraSLT

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An overcharged system will over pressure the system, and that will shut the compressor off. Also, if the evaporator ices up, also due to too much refrigerant, it will cool well, then go warm, then cool again once the evaporator thaws. Have you had any work done on it recently?

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