Question about Chevrolet 2500

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I have a 2007 2500 HD Diesel. It has the 6.6 LMM engine. I used to get a pretty poor 18 to 20 MPG, now that I have had it for 3 years. I am getting closer to 10 - 12 MPG. Is this normal or should I be getting this looked at

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It was an already poor gas mileage, now it has goon even worse. Check the filters and the diesel pump, it must be cleaned and adjusted on the testing bench.

Posted on Aug 22, 2010

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Posted on Jan 02, 2017

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