The Trailer Life 2018 Towing Guide states that the Canyon with the 3.6 V-8 is rated to tow 7000 pounds IF it has the factory towing package.
That being said, I tow my 7000# Starcraft Autumn Ridge with a Toyota Tundra with a 5.8L V-8 and it tows like it isn't even there. I would never consider towing it with anything less. I would suggest before buying a TT that you find a place to rent one, or as a last resort rent a U-haul cargo trailer and load it to 6500-7000 pounds and see if your truck will handle it. You also need to consider your braking potential with that heavy load. Good luck...