Avalanche 2500 4WD V8-8.1L VIN G (2003)
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Camshaft Position Sensor: Description and Operation
Camshaft Position (CMP) Sensor
The CMP sensor is also a magneto resistive sensor, with the same type of circuits as the CKP sensor. The CMP sensor signal is a digital ON/OFF pulse,
output once per revolution of the camshaft. The CMP sensor information is used by the PCM to determine the position of the valve train relative to the
CKP.