Lots of people tow with Colorados; I'm sure there is a wide selection of trailers out there that would work. Whether it's a Colorado or a 3500 DRW, the same advice applies;
- use your stickered payload unless you weigh your truck and deduct that from the GVWR to get a better "as used" payload number.
- Remember that most trucks will run out of payload/GVWR long before reaching the advertised "max tow" rating making payload the choke point in your selection.
- never use a trailer manufacturer's dry trailer weight or dry tongue weight as they are inaccurate and you will never tow it completely empty. Use the trailer's GVWR and 12 - 15% tongue weight.
- remember that, in addition to TW, you need to deduct for passengers, gear and any accessories you've added to your truck as well as for the hitch.
- wheelbase has a direct relationship to stability, particularly with the windage of a travel trailer. Keep this in mind;
- lastly, avoid confirmation bias - if you get 10 people telling you the trailer is too much for your truck and one that says "you'll be fine", don't latch on to that one answer just because that's what you want to hear. Be safe.
Happy shopping and good luck.
Dave