Sensor, Coolant Temperature for 90~95 ZR-1 LT5. Sold individually, one (1) Coolant Temperature Sensor is required per engine.  This is the top coolant sensor in the LH (driver) side injector housing, under the plenum.  It has 2 pins in the connector, yellow & black wires.  This sensor provides the signal to the ECM, which controls the cooling fans and other engine management functions.

NOTE: This is a NEW, AC Delco part.