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Increase mpg

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02-07-2011, 08:19 PM	#1
reesew Registered User Join Date: Feb 2011 Location: dewitt iowa Posts: 7	Increase mpg OK here is my question I want to get more than 16/gal out of my 2008 Silverado LS with 4.8. I thought of a power programer. Do they work? Asked my mechanic he says it wil fry my computer, dealer customer service says it will void my warrinty, Lots of questions anyone have any ad ice?

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