Thanks for the information gentleman.At some point (when I want to totally kill my mileage and drill holes in my roof) I will probably install a Smittybilt Defender rack, if bolted to the roof they are rock solid and tough to knock off. I haven't measured things out but I suspect the 4x4x4 model would look nice on the Colorado with a light bar on front. Here is a 'How To' where the put one on a larger PU.