Where is the pcv vavle Chevy 2005 Colorado?

The PCV valve on a 2005 Chevy Colorado is located on the valve cover. It's usually a small, plastic valve with a hose connected to it. To be precise, you'll need to look at the top of the engine, near the back (closest to the firewall) on the passenger side valve cover. There might be a few hoses and other components near it, but the PCV valve itself is relatively easy to spot once you know what to look for. A picture of your engine online might help you pinpoint it exactly.