Question about 2007 GMC Yukon Denali

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I have a emission light on - 2007 GMC Yukon Denali

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You can check for stupid ****,like loose wires and hoses,but just take it to a shop and have them pull up the fault code from the pcm,you can also buy your own OBD2 scanner around 150 bucks for a cheapy

Posted on Apr 25, 2010

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U must get the electronic engine/emission control system tested for the fault code(s) that is stored with the light being turned on, there are over 200 poss possibilities, they range from a loose gas cap to problems with the fuel injection and emission control systems, Autozone does this test for free, but most likely this will be covered under the 7 year 70,000 miles emission warranty so a trip to the dealer is the best thing to do if you are still under 70,000 miles.

Posted on Apr 25, 2010

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