What does code po453 mean on 2002 Chevy Silverado mean?

The code P0453 on a 2002 Chevy Silverado indicates that there is a high voltage signal detected from the Evaporative Emission System Pressure Sensor (EVAP). This sensor monitors the pressure in the fuel tank and related components to ensure proper operation of the EVAP system. A high voltage reading may suggest a faulty sensor, damaged wiring, or issues with the EVAP system itself. It's advisable to inspect the sensor and its connections to diagnose and resolve the issue effectively.