Knock sensors are devices used in internal combustion engines to detect engine knock or detonation. The knock sensor detects vibrations and sends a signal to the engine control module (ECM), to ...

No components need to be replaced to repair the fuel injector flow rate. To calibrate the flow rate correctly, the service personnel must reprogram the Engine Control Module with new settings.

GM has issued a service update for some units of the 2023-2024 GMC Sierra 1500 for an ECM fix to remedy improper fuel flow rate during certain types of driving.

The Engine Control Module (ECM) is the computer responsible for controlling the engine. The ECM communicates with other vehicle control units via a communication bus.