ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor Fits 2004 Chevrolet Silverado 1500

An ACDelco GM Original Equipment Ignition Knock (Detonation) Sensor monitors the engine for pinging or spark knock, and is a GM-recommended replacement for your vehicle’s original component. The sensor creates a voltage signal based on the vibrations caused by erratic air/fuel mixture combustion; the engine control module uses this signal to adjust the ignition timing and air/fuel mixture. This original equipment ignition knock sensor has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. ACDelco GM Original Equipment 213-3521 Ignition Knock (Detonation) Sensor