I bought the Colorado as a demo with 8K miles. The only item I had to replace was an oxygen sensor that I replaced myself for $60. I take very good care of my vehicles and the truck still looks and runs like brand new after 100K miles.
Hefty appearance, big wheels and tires. Cruise works very well - doesn't lag on hills. OK sound system.
Don't get the traction control. It doesn't work and can even be dangerous. Fan squeals a little. Paint is a bit soft.