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GMC Master
53,816 Answers
- Posted on Jan 15, 2017
Re: 2006 GMC Yukon, 3/4 ton with tow package will not...
Check ICS for correct operation
engine idle speed is 850 -950 rpms for auto and 750-850 for manual
at 1200 rpms you are not on the idle circuits but on power circuits
run the fault codes
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