Question about 2003 GMC Yukon

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I have 20-codes pulled on my 2003 GMC Yukon, does that mean a harness issue could be the problem?

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Depends on the codes but it is a good indicator that either a harness or ecm has failed.

Posted on Jan 04, 2017

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Depends on the codes. More likely the ECU is toast.

Posted on Jan 04, 2017

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What does code co690 mean on a gmc yukon denali 2001


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1 Answer

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