I've done some looking into the Colorado myself. it seems like on paper the numbers are just as good as my 2006 Silverado. It just seems like you wouldn't want to tow much more than 5000lbs. that V6 builds its power at higher rpm so you'd be in the pedal alot. alot of guys also mentioned the shear size of it as far as aerodynamics. The dimensions won't help it cut through the wind as much making it more susceptible to wind blowing you all over the place.
as others have said a bit smaller trailer would probably be the best advise. you might get away with it if you were towing in relatively flat terrain. It may even perform well in perfect scenarios but when you find yourself in trouble is when you'd need a bit bigger truck.