My father just recently bought a 2016 GMC Canyon (Mechanically identical to the Colorado, for those who may not know) Crew Cab Standard Box. It is a 2wd with the 3.42 rear end, and has a Tekonsha Prodigy P3 brake controller added.
He is pulling a 2015 Palomino Puma 25RS, with a yellow sticker dry weight of 4930 pounds. Was mostly empty when we pulled it home, but the grey and black holding tanks were nearly full to capacity, as the previous owner had not emptied them. Only pulled it home from the dealer so far, but I was able to drive it part of the way, and it pulled very well overall. The trailer did not have a sway ball on the tongue, so we couldn't hook up a friction sway control for the trip home, but we were using a Reese weight distribution hitch. It was a little busy without a sway control, but overall I thought it towed very well. It seemed to have plenty of power, but would not pull 5th or 6th gear on the highway at 60mph. 4th gear was sitting right around 2600RPM.
With your trailer weighing approximately half what the 25RS does, I am sure you will be satisfied with the performance from the new Colorado. You may even be able to pull 5th or 6th gear.
Here is a picture of the Canyon and the 25RS at a gas stop on the way back from the dealer with it: