Q: How to replace Pressure Sensor on Chevrolet Corvette?
A: The HVAC pressure switch is located on the hard line of the evaporator. Unplug the electrical connector from the pressure cycling switch. Unscrew the HVAC pressure switch. Replace the O-ring, and lubricate it with clean refrigerant oil of the correct type. Lastly, reconnect the electrical connector and install the air filter housing.