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GMC Sierra 1500 2WD V6-4.3L VIN X (2004)02 · Sensors and Switches
02 · Diagnostics

Crankshaft Position Sensor: Technical Service Bulletins (page 4 of 4)

Make
GMC
Model
Sierra 1500 2WD
Engine
V6-4.3L VIN X
Year
2004
Section
Sensors and Switches - Powertrain Management › Sensors and Switches - Ignition System › Crankshaft Position Sensor
Sensors and SwitchesTechnical Service Bulletins · page 4 of 4
Crankshaft Position Sensor: Technical Service Bulletins (page 4 of 4) – GMC Sierra 1500 2WD V6-4.3L VIN X (2004)

Crankshaft Position Sensor: Description and Operation

CRANKSHAFT POSITION (CKP) SENSOR

The CKP sensor is a three wire sensor based on the magneto resistive principle. A magneto resistive sensor uses two magnetic pickups between a
permanent magnet. As an element such as a reluctor wheel passes the magnets the resulting change in the magnetic field is used by the sensor electronics
to produce a digital output pulse. The PCM supplies a 12-volt, low reference, and signal circuit to the CKP sensor. The sensor returns a digital ON/OFF
pulse 3 times per crankshaft revolution for the V6 engine, 4 times for the V8 engine. The CKP sensor reads the crankshaft mounted reluctor wheel to
identify pairs of cylinders at top dead center (TDC).

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Parts & tools for this job For 2004 GMC Sierra 1500 2WD 4.3L

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