1997 Oldsmobile Bravada

Noises problem
1997 Oldsmobile Bravada 6 cyl Two Wheel Drive Automatic 148000 miles

Especially when accelerating I hear water sloshing from behind the dash somewhere. There is not been any evidence of water leaking in or out of the car. I can not figure out where the water is at, with winter coming I am afraid it will freeze, any suggestions?
J merchant
September 15, 2008.

Hi: Most likely what you're hearing isn't water but rather coolant. Make sure your engine coolant is full. To me it sounds like coolant is being pumped into a somewhat empty heater core when the engine reves.

Let me know what you find.