Thermostat

[rednwhite00]

Hi I have a 2009 Pontiac Montana sv6. I am in Canada. In winter in really cold weather let’s say above -25’c it does not want to stay warm inside the cab and blows cool air. If I rev it up it may get a bit warmer. In the temps under -25’c it does blow hotter inside cab. Over the last few years I have changed rad caps and put in a new water pump last winter. I have not changed the thermostat or hoses yet. Am sure it’s still factory as I am the second owner. Had about 44000 km on it when I bought it. Anyone have any ideas? Thank you in advance.

 

[melsg5]

What does the engine temperature gauge show, normal or low? If low change the thermostat.

 

[rednwhite00]

Hi it’s normal in summer and in winter maybe a bit lower than normal when it gets over -20’c or so then tends to be blowing cooler and temp gauge is lower than normal unless I up the revs. But on winter temps when warmer outside it’s normal and blows heat.

 

[melsg5]

It should not go lower than normal, try changing it and make sure it's a 195F thermostat.

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[rednwhite00]

It should not go lower than normal, try changing it and make sure it's a 195F thermostat.

Yes I think I will have it changed and all the hoses to while it’s already apart. I think it’s all still factory parts when built. Better to be safe. Thank you