New Duramax/Allison owner here

[Delaine and Lindy]

Ozzie, Congrats on being the owner of the most powerful Truck in America. Its a AWESOME Truck. The Tow haul mode can be engaged at anytime, or you can control the 6 Speed yourself. When in the M mode you can upshift or downshift with one finger. The Allison will take care of everything in the tow haul mode. Try to get about 500 non towing miles, then drive her like you stole it. We got a new dually in June of 2005 had 7 miles on it when we pick it up, had to leave Colorado Springs the next morning and we did, it had a 125 miles on OD and we pull thru the Rockies. The biggest reason is to set the rear gears, the Duramax/Allison is no problem. But I wouldn't recomend doing that, I should have stayed a few days and run up to 500 miles. Only one other thing to say you will LOVE the Classic. GBY....