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Old 02-24-2012, 03:57 PM   #11
rumbleweed
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It is not necessarily how much weight you are towing that changes the mpg tow vs non-tow mpg, it is the percentage of total weight increase . On my 2500HD I get low mpg ( about 12-15 mpg) without the TM and the same low mpg with the TM.
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