low MPG on 2007 Chevrolet Silverado 2500 HD

I hear of other 2500 HD Duramax Diesel truck owners of getting good mileage while I only get 13MPG or less in my 2007 HD Duramax Diesel, what is the problem why is my truck not given me a good Mileage? thanks I apressiate your imput

by in Gresham, OR on February 21, 2011
0 answers
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