Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONDISTRIBUTOR IGNITION (DI) SYSTEMCMP SENSOR (HVS) IN DISTRIBUTOR
2001 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
CMP Sensor (HVS) in Distributor
2001 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION CMP Sensor (HVS) in Distributor
The CMP sensor is located in the distributor base. The distributor is driven by the camshaft and distributes the secondary voltage to the spark plugs through the distributor rotor, cap, and wires. The CMP sensor produces a signal once every revolution of the camshaft. The CMP signal identifies the position of the #1 cylinder relative to the crankshaft.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.