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Old 09-01-2014, 10:06 AM   #71
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Join Date: May 2014
Location: IL
Posts: 405
Hi,

My 2001 Duramax was replaced at about 175k miles with a 2009 Dmax that now has 85k miles on it. I tow about 10k miles a year -- sometimes more, never less.

The 2001 got about 1-2 mpg better fuel economy (empty and towing), but the six speed Allison is a wonderful thing to have when pulling a medium sized fiver. For mere mortals towing legal loads, I can't see a need to add a tuner to any of the recent model year diesels.

FWIW.

Rich Phillips
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