4WD - 8/28/2015 14:01

As a generic statement, for engines and trucks around those years, your vehicle will have coolant sensors or switches for:

A. Engine's ECM (sensor)

B. OEM truck's dash gauge (sensor)

C. OEM truck's dash idiot light / warning buzzer (basically an ON/OFF switch, at a certain temp) = may only have "one wire" to that coolant "switch" {if it is a one wire unit, then it "grounds" thru the threads of the sensor, to the engine itself}