I made a 10hr tow from east TN to Bowling Green Kentucky today 5hrs each way with a boat lift on a 20' tandem trailer 3500lbs. Through the mountains and performed better than expected. GM hit a home run on this one.
I towed our 2 four wheelers on a 2 place Triton trailer on Saturday. In 55 mph zones I found myself going over 60mph without even noticing. I passed a couple vehicles with ease. I towed about ~80 miles. Oh and the exhaust brake worked like a charm.