2002 ss monte
#2
I don't think these models have an actual sending unit. There is an engine coolant temperature sensor (ECT) mounted directly underneath the thermostat housing that sends signals to the PCM, which in turn sends signals to the gauge.
The ECT has only 2 wires: a signal and a ground, and they both go directly to the PCM.
The ECT has only 2 wires: a signal and a ground, and they both go directly to the PCM.