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2009 Duramax Mileage
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09-26-2009, 04:56 AM
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Jolu
Montana Master
Join Date: Nov 2007
Location: Canon City
Posts: 1,340
M.O.C. #7919
Our 08 is the same as exav8tr. At times it appears to get better mileage in tow haul mode. I am still evaluating the tow haul mode mileage. I think it all depends on the terrain.
Jolu
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