20 Most Recent 2008 GMC Sierra 1500 - Page 6 Questions & Answers

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2008 gmc Sierra a/c air blows out defroster vents and at foot but no air out of ads vents. It has dual controls.

check for a vacumn leak follow the lines that come out of firewall this can be the cause if you find a leak
5/27/2012 2:27:51 AM • 2008 GMC Sierra... • Answered on May 27, 2012
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My gmc sierra says engine hot ac turned off

My truck just did the exact same thing -- and it was a Sensor -- cost me $40.00 to get repaired at a local auto repair shop.
2/19/2012 1:20:17 AM • 2008 GMC Sierra... • Answered on Feb 19, 2012
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