Having problems with your 2002 Pontiac Aztek ?
Heater work's when car is going down the road , temp stay's normal, but plows cold when in park and temp gage goes up.
Either one of two things ,1/ you are low on coolant which is a high possibility or the 2/ is the impeller on the water pump drive shaft is plastic and its slipping on the metal drive shaft of the water pump quite a common fault on modern cars
Repair Help & Product Troubleshooting for 2002 Pontiac Aztek
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