Where is the oil drain plug on 2005 Chevy Colorado 5 cld engine?

The oil drain plug on a 2005 Chevy Colorado 5-cylinder engine (2.8L or 3.5L) is located on the bottom of the oil pan. To be more precise, it's on the lower front of the oil pan. You'll need to get underneath the truck to access it. It's usually a fairly standard bolt, but you should always consult your owner's manual for a diagram and specific instructions.