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Q: What is causing the engine temp gauge to skyrocket then cut the engine only when your revs are low and the heater to stop working as the temp gauge starts to climb on your 1999 Pontiac Montana?
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Why would a 2002 Pontiac Montana overheat while your idleing?

Low coolant Water pump not working properly Cooling fan not working Thermostat not opening fully Radiator plugged or dirty Check the radiator fan.


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I just had that same problem..I took it in to have it fixed and they replaced the blower motor resistor and that seems to have fixed the problem


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Where is the wiper fluid reservoir for the rear wiper on a Pontiac Montana?

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How do you fix engine running hot and power loss during acceleration in a 2001 Pontiac Montana?

Your an is goinginto overheat protect mode. You need to make sure the fans are working, check relays, fuses, fans themself and wires. If that isall working could be timeto replace coolant, thermostat or water pump or all of it.