Thread: engine coolant temp sensor

I know my car takes the 2 terminal coolant temp sensor, but i see that RockAuto also sales a 3 terminal coolant temp sensor.

Would anybody know what the 3 terminal coolant temp sensor is for?

Two sensors built into one package. If you have a two terminal, then your pcm feeds your dash gauge, vs it being seperate feeds.

Our cars only have one coolant temperature sensor which means it feeds the pcm and guage so why is there a 2 terminal and 3 terminal sensor available

So my 00' GS and 01' LS regal should take the 2 terminal or either one would work rather 2 or 3 terminal?

Whats the 3 terminal ECT for?