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Old 12-19-2009, 08:56 PM   #10
extd56
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Join Date: Nov 2004
Location: Vacaville, CA
Posts: 2,272
Re: Need to improve mileage!

I only get 15MPG in my Avalanche and that is with overdrive and fuel injection. I am getting about 18 with my 67 extended cab truck with a 91 TBI motor and a 400 trans with 3.07 rear gears.
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