Sensor gauge for thermostat for A/C on 2006 Chevrolet Monte Carlo

My temperature gauge reads -40 degrees and therefore will not allow my A/C and Defrost to kick on! Not sure where the sensor for the gauge is located.

1 answer
The ambient temperature sensor is usually located in front of the radiator or under the bumper some where. The sensor has two wires attached to it one light green/black the other is yellow. The sensor may just be disconnected.