Acdelco Gm Original Equipment 213-3521 Ignition Knock (Detonation) Sensor

Acdelco Gm Original Equipment Ignition Knock (Detonation) Sensors Monitor The Engine For Pinging Or Spark Knock, And Are Gm-Recommended Replacements For Your Vehicle’S Original Components. These Sensors Create A Voltage Signal Based On The Vibrations Caused By Erratic Air/Fuel Mixture Combustion; The Engine Control Module Uses These Signals To Adjust The Ignition Timing And Air/Fuel Mixture. These Original Equipment Ignition Knock Sensors Have Been Manufactured To Fit Your Gm Vehicle, Providing The Same Performance, Durability, And Service Life You Expect From General Motors.