ACDelco GM Original Equipment 213-969 Ignition Knock (Detonation) Sensor workwarehouse For an older drum style

For an older drum style brake job that didn't have the adjuster window for the rear brakes

Gauge registers 0 - 300 PSI

No App Required

just insert into tow package port and twist

a good usb port extender for laptop

ACDelco GM Original Equipment 213-969 Ignition Knock (Detonation) Sensor workwarehouse For an older drum styleACDelco GM Original Equipment 213 969 Ignition Knock (Detonation) Sensor 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 vehicles 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