I am not to car smart, but try checking sensors, relays, fuses, the fan, and the valve that is suppose to open up to allow the coolant in to cool off the engine.
I Have A 1997 Monte Carlo 3.4 That Is Overheating Changed Water Pump, Head Gasket,thermostat, Air Cond Compressor And It Still Heats Up To 3/4 Of The Gauge When Idling Or Stopped.any Help?
Try your coolant level sensor or try your float level sensor they are the same thing they just have different names for it .I hope this helps