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03-25-2012, 11:14 PM | #6 |
Kung Fu Master
Join Date: Oct 2005
Location: Montana
Posts: 543
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Re: 2010 Silverado 2500HD Fuel Economy
Hmmmm, if you are getting that good of mileage, I'd be reluctant to change anything. However, if you decide to, have someone do a custom tune for your vehicle. I had BlackBear Performance do a chip for mine and so far it's been good. I didn't see huge mileage gains, but probably an honest 1.5-2 mpg difference from stock. I'll see an average of 15 on the highway at 70-75. Not the greatest, but better than 12-13 I guess. Power and performance were improved as well.
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