How are cylinders numbered on a 5 cylinder 06 Chevy Colorado?

On a 2006 Chevy Colorado with a 5-cylinder engine, the cylinders are numbered from front to back. The numbering starts with cylinder 1 at the front of the engine (the side with the accessory drive) and continues to cylinder 5 at the rear. The engine is laid out in a straight configuration, so the numbering follows a simple sequential order.