Just completed first tow....good and bad!,
As a newby, We just finished our first tow with a 2011 GMC hd 2500 6.0 gas from st louis, mo. to harrington beach campground north of Milwaukee, Ws. Trailer is about 8000 pounds. Trip was about 860 mi...
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What I meant was it shifts a lot in low rolling hills here in Nebraska. I bought the tt in davenport IA ( more hills) and on the way home it was shifting a lot so I used m4 and dropped to 55-60 mph and let it cruise at 3000 rpm all day, ( I have 4.10 gears ) and got a whopping 7 mpg which didnt bother me except for the fact that the 26 gal tank needed refilled every 200 miles.
