GovernmentMotorsFan

Thanks to everyone that replied

I purchased a GMC 2500 AT4 last week with this gas 6.6. First off I really do like the truck. I like the AT4 package and all the features. Overall it seems like a well built truck and I don’t have any complaints. I started to tow pretty quick with the truck after a couple hundred miles. The last items I hauled was 6,200 pounds. I think the truck performs better not in tow haul mode. In tow haul mode the truck is in a lower gear, only wants to shifts at 3k rpm’s and will down shift while slowing down and kick the rpm’s up to 3.5k. When I came back home I didn’t put the truck in tow haul mode and I feel like it did 10 times better. Wanted to see if anyone else has hauled with the 6.6 gas and had the same thoughts. Maybe you need to get in heavier items for the tow haul to be effective.