my friends dad has one 2500/8.1 does doe any real towing with it, rides just like a suburban. They are based on the sub's chasse. I have a 2500 sliverado with the 6.0 and does great for towing. But the 8.1 has more power and you only suffer like 1-2mpg difference. We drove 3.5hrs in his rode just fine compared to my 3/4 ton.