How do you replace battery on a 2004 Pontiac Montana?

To replace the battery on a 2004 Pontiac Montana, first, ensure the vehicle is turned off and parked safely. Open the hood and locate the battery; remove the negative cable (black) first, followed by the positive cable (red). Take out any battery hold-downs, then carefully lift the old battery out. Place the new battery in the same position, reattach the hold-downs, connect the positive cable first, then the negative cable, and make sure everything is secure before closing the hood.