Well so far we are almost home to see my folks will be a 870 mile trip one way.
My Colorado with the 3.5 motor is still pulling great through the mountains of BC.
Truck has 3.73 gears we tow in 3rd gear at about 2700 rpm at 60 mph with cruise control on and it never kicks out. And transmission temps run 167*F and water temps are 203*F.
Trailer is a 20ft and weighs in about 3300 loaded and seems to be a good match to the truck.
Four years now towing with this set up and this is its second time doing this road trip.
2006 chevy colorado xtream.
Holiday Rambler 187qb.