2003 Montana has no heat.

Asked by Nov 11, 2014 at 07:51 AM about the 2003 Pontiac Montana Value Extended

Question type: Maintenance & Repair

I changed the thermostat and it is worst than it was, it use to be warm now it's cold and the motor is running hot, Water pump???

1 Answer

100,345

Most likely an air pocket, or the thermostat is in backwards. Some of these can be a real bear getting the air out. I've had good luck elevating the nose up about 2 feet before adding coolant, but occasionally there is that stubborn one that I have to hook up a power flusher too to get it all out. HTH

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