['97ventureowner]

Welcome to the forums! First thing to check is to make sure you have a good connection between the switch and the electrical connector. You can also take the time to clean the contacts on the switch to see if that solves your problem. I own two Chevy Ventures ( sister to the Montana,) and have replaced the switches in both my vehicles. The drivers' side switch is a master switch which controls both sides, so if your driver's side is still working, I would tend to think your passenger side switch is faulty if it still doesn't work after checking the contacts and connection. You can get a new one at the parts department of your local GM dealer, or even order one online through one of the many GM parts depts. that sell online. I have found many of these online dealers are less expensive, even with shipping costs added in. You could try one from your local salvage yard, but be sure it works before you purchase it.