I have a 2006 Pontiac Torrent I've replace upper and lower intake gasket, water pump, thermostat, heater core, all hose, and it still overheating....I've drained the motor oil and it's normal
Is your radiator fan coming on ? With the car parked and no other noise than the engine running .. watch you temp gauge and listen for the engine fan to come on .. if it comes on you should see the temperature drop. If not than that could be your problem
3.4s blow head gaskets. It's the 3.8s that have intake gasket failures. Try bleeding any air from the cooling system. Also, have the cooling system tested for exhaust gases being present in the coolant. If it tests positive, the head gasket is blown. HTH. -Jim
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