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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If you have a 4:10 rear, that's probably average. I did have an 08 CC SB 6.0 w/373. Pulling a 9.2k 5er, it got 8.2 to 9.2 consistently at 62 to 65 mph. I got 8.2 pulling in the TN & NC mountains & did use cruise on level & very gently rolling hills. I went to diesel mainly for the benefit of using cruise & hopefully better mileage. The diesel is a pleasure going up & down hills & I can use cruise 95% of the time (traffic permitting). It gets better mileage empty but unfortunately the towing mileage is almost identical.
