I have a 2002 buick rendezvous it blows cold air when at idle and warm air when

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tcaterini

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Driving. In the summer the te? I have a 2002 buick rendezvous it blows cold air when at idle and warm air when driveing. In the summer the temp gauge is all over the place when at idel the temp will go higer but then goes down to normal when driveing. Any ideas? possible thermostat?
 
It could be the thermostat yes. I don't doubt you already did this, but be sure to check all of your fluids. Running low on anti-freeze could cause this. Best thing to do is talk to a service person at your local GM dealership.
 
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