Envoy 2WD V8-5.3L VIN M (2005)
Camshaft Position Sensor: Description and Operation
CAMSHAFT POSITION (CMP) SENSOR
The camshaft position (CMP) sensor is also a magneto resistive sensor, with the same type of circuits as the crankshaft position (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 engine control module
(ECM) to determine the position of the valve train relative to the CKP.
