Duramax and towing a 10600lb 5th wheel
This is a question about the trans. Should I just leave the truck in "D" and go or should I be in manual mode and restrict it to 5th gear? The truck seems to be laboring on slight uphill grades but wi...
Forum Discussion
In town and the mountains, I select the gears. The thumb shifter makes it easy, and combined with the exhaust brake, much less wear on the service brakes.
