My 2001 Pontiac montana is leaking coolant when it cool of. Its dripping from the transmition passenger side. I croled underneath and found that the coolant is leaking from the pass side of the engine behind timing chain cover. Any idea what this might be.

SOURCE: Heater core?

yes the heater core is blown you can bypass the heater core on these vehicles fairly easily find the two hoses going from the motor to the firewall unhook them from the firewall get a radiator flush kit from walmart or any other place autozone advance etc. use the corresponding tube size and clamp the two together this will work to get you where you need to go you will not have heat in the vehicle but its summer this buys you time because the heater core on that car is difficult to get out not impossible mind you difficult the part is cheap as things go the labor will kill you in cost you may want to try it yourself get a haynes manual from the parts store read through the section on the heater core twice take a deep breath and go for it.....oh after you bypass the heater core check the system for excessive preassure when first cranked because usually they dont just go out also it probably time for an intake manifold gasket they will use water these cars are super easy to work on up top with a manual parts are affordable let me know if I can help further

SOURCE: 2001 Pontiac Montana Temperature Gage and Fuel Gage malfunction

sending unit or float in gas tank, check if any broken wires or well plugged in and then check the float for the gas.

SOURCE: Draining the Engine Block of Coolant.

the drain plug is under the front of the truck on the drivers side back of the radiator. you have to turn it to open it .

SOURCE: 2003 pontiac montana passenger side power window

mine does that. i just pull the switch a little harder on drivers side and it works

SOURCE: My 04 grand prix is leaking coolant. It was first

I had the same problem.The leak was from the block heater.I did not notice any leaks on the ground,but was always low on anti freeze.The block heater came apart on the highway and blew all the fluid out of the car,luckly i shut the car off and had it towed to the shop.They replaced the block heater with a rubber frost plug to get me back on the road.Have your block heater checked,they maybe your problem has well.