Question about 2003 Chevrolet Suburban 1500

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Rear a/c does not blow or cool when activated.

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Check the front switch to insure that it is powering the rear unit which is the master switch for the climate control.

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

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Did you hear a little rythmic squeaking noise under the dash by the driver's right knee? Is the noise now gone? There is a little oscillating air flow gate there that often goes bad...I can't remember the name of the part, for the life of me, but the dealer has them.

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there are separate actuators for the blend doors. one for heat and one for cool. they work opposite and in conjuction with each other, if that makes any sense. ones open, ones close, for each different climate. sounds like the the cold one isn't opening in the rear.

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