What are the diagnostic codes for 2002 Chevy trailblazer?

The diagnostic codes for a 2002 Chevy TrailBlazer, commonly referred to as OBD-II codes, can range from P0001 to P1999. These codes indicate various issues related to the vehicle's engine, transmission, and other systems. For example, a code like P0420 signifies a problem with the catalytic converter's efficiency, while P0300 indicates a random/multiple cylinder misfire. To retrieve specific codes, a diagnostic scanner or code reader is typically used.