1997 Pontiac Transport

Heater problem
1997 Pontiac Transport 6 cyl Front Wheel Drive Automatic 189000 miles

I have a 97 montana 3.4. My first question is were is the thermstat control valve for the heater core. I.E the temperture selection. I have a antifreeze leak in the cabin part of the van its probably the heater core. Is there anything else it could be. How do you get the heater core out of this van. Is there issue with certian parts. What the price for a new heater core
December 21, 2007.

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