The intake gasket went luckily before warranty ran out, but still had to pay $100 to dealership for warranty work to be done. Asked dealer to look over all other gaskets, which they had said were all fine. Shortly after warranty ran out, head gasket shot. Dealer would not repair under goodwill warranty and really tried to avoid having to fix this problem. This will cost me around $2500 to repair and there is no guarantee on how long it will last for. Talked with several mechanics and they all know all to well the problems with the Pontiac Montana.
The Montana looks good and is a very comfortable ride, bu with the mechanical issues and lack of commitment from Pontiac, I will never buy a Pontiac or GM product again. I will pay the extra expense to buy a foreign car.
Honda Minivans have significant problems with their trannies. Out of all the minivans the NEW model sienna is probably your best shot for reliability.