Where is the number one cylinder on a 2001 Pontiac Montana van?

On a 2001 Pontiac Montana van, the number one cylinder is located at the front of the engine on the driver's side. This is a common layout for V6 engines, where the cylinders are numbered from the front to the back. For the 3.4L V6 engine in this model, the numbering typically starts with the driver's side as one and continues to the passenger side.