2003 Montana minivan that you just changed the thermostat in and it doesn't seem like the antifreeze is circulating you open the bleed screw on the thermos housing and there is nothing coming out the?

Is The Engine Running Hot ? If Not Its Circulating. I Have Never Seen A Bleeder Screw On This Engine For The Water. The Brake System Has Bleeders. If The Engine Runs Hot Due To No Circulation You May Have Installed Thermostat The Wrong Direction. If It Gets Hot After You Let It Set & Idle For 10 Minutes Or So. Let It Cool Down Recheck Your Installation.