Gmc envoy idles up and down when air is on

2005 GMC ENVOY
100,000 MILES
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ADRIEN
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my GMC Envoy idles up and down, but when i run my air its much worse, to the point that it will shut off and my air compressor clicks on and off. what is that?
Jun 29, 2012 at 3:47 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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