The Colorado (Chevy) or Canyon (GMC) came with either a 4cyl or 5cyl. Both engines have a gas saving managment system where under certain non-load periods, they will drop an odd cylinder occasionally. This is not a problem, but a "feature", and to be honest most times you don't notice it.
If a 4wd, the front diff is IFS and aluminum to boot, so if you abuse it, carrier will break.
I drive a 2rd automatic for work. It has 38K an it and has been in the shop for the cruise control/brake switch recall, no tail lights on brake, and numerous ABS problems (failing within a block of leaving the shop).
I don't like all that hose crap hanging out fron under the truck, and every Colorado I have seen has this feature also. I am always afraid it will get caught on something on the jobsite. Unless you take the rear tires to 26psi and carry a load way in the back, it will suck badly in the winter.
I am 6' and the truck is not something I have ever been comfortable in. When you get the steering wheel set right, the seat is too far back to reach the pedals and visa versa.
It is economical at 26 to 28mpg hwy, and seems to carry a S-10 sized load OK.
The long and short is that I wouldn't buy one.
Ron