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
kaydeejay wrote:
Leave it in "D" and select "Tow-Haul".
Your computer is smart enough to figure out the best gear to be in.
Yep, I agree too. Leave it in D.
The only time I need to shift up or down is going down or up steep grades but even then it's rare I need to fiddle with anything.
