2006 2500HD horrible mpg

By jt metal
August 26, 2018 in 2000-2014 Silverado HD & Sierra HD

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Noco

Posted September 11, 2018

I have the same issue. I read up on the issue and several people said a crankshaft position relearn fixed the problem.

I have not done it because the local dealership wants a minimum of $75 to look at it with no guarantee they will perform the relearn which is an additional $95.

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