Why does floor stay wet on passenger side of your 2004 Pontiac Montana?

The wet floor on the passenger side of your 2004 Pontiac Montana could be due to a clogged or damaged drain from the windshield or sunroof, allowing water to leak into the cabin. It may also be a result of a malfunctioning heater core, which can cause coolant to leak into the passenger area. Additionally, worn or damaged door seals could allow rainwater to enter the vehicle. Inspecting these areas can help identify the source of the moisture.