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Old 05-18-2010, 07:23 AM   #2
dwaite72lnghrn
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Join Date: Jun 2002
Location: central pa
Posts: 1,525
Re: 2010 Silverado 2500HD Fuel Economy

I think that is about normal for the 6.0. My brother had 1 for work and on the highway he would get about 13-14mpg. That's why I went with the diesel.
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