Lost keys

Just had a pair made for a '95 Grand Caravan yesterday at the dealership. All they needed was the vehicle I.D. Number. If the GM dealers can't do that or it's too old, the easiest thing to do is to remove a door lock cylinder and take that to a locksmith or the dealer. They'll be able to take the cylinder apart to measure the tumblers and cut a matching key.

A lock smith can cut you a new set. They have a tool that does it without removing anything