I have a 1999 Grand Prix 4-dr 3.8L. Car runs great.
In the past two weeks, have started having overheating issues. Temp is going up to 215 while driving, then jumps to 225 when idling. Low coolant light flashing, although coolant is full (overfull) in reservoir. Thermostat is original.
When car is overheated, both upper and lower hoses feel equally hot. I opened the bleeder valve. It did take a while for coolant to emerge, but not sure that would have been the issue.
I was scratching my head and then realized that NEITHER OF THE RADIATOR FANS IS COMING ON! Checked both fuses; they are good. Haven't checked relays; don't know ow to do that. But since BOTH fans are not running, it must be something in a common control.
Any ideas of where to start troubleshooting?
I was going to replace thermostat (have a new one), but I don't think that's the issue now.
Any help appreciated.