The PPC1092 is a powertrain control module (PCM) designed and manufactured by General Motors. It is designed to be used as an engine management system in certain GM vehicles. This PCM is used in vehicles such as the Chevrolet Trailblazer, GMC Envoy, and Buick Rainier. The PPC1092 is able to control various components of the engine system, such as fuel injection and ignition timing. It can also perform diagnostic tests and store error codes, allowing mechanics to quickly identify any issues that may be occurring with the engine.