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06-20-2008, 07:53 PM
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Registered User
 
Join Date: Nov 2007
Location: Turlock California 95380
Posts: 2,075
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Duramax mpg's
I am considering selling my 72 C20 because of the 10 mpg that I am getting for a 05 Duramax. The owner selling it claims to get 25+mpgs on the highway
That seems like smoke up my tailpipe. Is there any Duramax owners that get that much out of it. Someone else told me that the Bullydog chip can get 30 mpg on the highway. I love my old truck so I would rather keep it and find out the hard way about the mileage. Thanks for any input. 
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72 C20 Longbed 05 1500 Z71 |
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