1995 Olds 88 Royale. 50, 193 actual miles. 3800 Series ii Engine.

Dash Temperature Gauge has stopped working 1 week ago.

Car as all stock. Not molested. Original everything.

Went to the Cheverolet Dealer to get information. There is only one sensor. Thinking it may have a sensor in the head. Per schematics nothing but the sensor under the thermostat . 3 wire unit. GRAY/GREEN/BLACK

Sensor is same one used to provide feedback to the ECU. Electric fans operate as normal and coming on when they are to do so. Car runs as normal. So I can conclude that my gauge is " done" ?