Questions about the Colorado appear in a number of threads on this forum. My advice is to browse the forum for threads that look as if they apply. You can also perform a search using the box at the top of the page. I've done that for you; here is a link
to the results of a search for posts containing the terms "Chevy" and "Colorado," for all of iRV2, not just this forum.
Once you've done that, the information you collect to determine what it may take to tow a vehicle is:
1) owner's manual for that model and year (usually available online)
2) the Motorhome Magazine dinghy towing guide for that year
3) application charts from the Roadmaster, Blue Ox and Demco Web sites
This should get you started.
Welcome to iRV2!