I have towed with both Chevy gas and Chevy diesels. That being said, I don't think I would ever go back to a gas model. Seems like everything, including the braking is beefed up on the diesel. We had an 2003 Duramax diesel and put 140K on it. No problems with engine or drive train and only went through 1 set of brakes. Traded it because the new Pinnacle weighs more than the truck could tow. Currently, have a 3500HD Duramax and love it. I would give the diesels a little more consideration.