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 MANUALSCHEVROLET1999EXPRESS 1/2 TON VAN V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCAMSHAFT POSITION SENSORSERVICE AND REPAIR
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Camshaft Position Sensor: Service and Repair
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Service and Repair
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the spark plug wires and ignition coil wire from the distributor.
4. Disconnect the CMP sensor harness connector from the distributor.
5. Remove the distributor cap screws.
6. Remove the distributor cap.
7. Remove the rotor screws.
8. Remove the rotor.
9. Remove the CMP sensor screws.
10. Align the square slot in the reluctor wheel with the CMP sensor.
11. Remove the CMP sensor.
INSTALLATION PROCEDURE
IMPORTANT: Do not use the old cap, CMP sensor, and rotor screws. Use replacement screws that have been coated with a thread locking compound. Precoated replacement distributor cap and CMP sensor screws can be acquired using P/N 10475922 (pkg of 10 screws). Precoated replacement rotor screws can be acquired using P/N 10475924 (pkg of 10 screws).
1. Align the square slot in the reluctor wheel with the CMP sensor.
2. Insert the CMP sensor through the reluctor wheel slot.
NOTE: Refer to Fastener Notice in Service Precautions.
3. Install new CMP sensor mounting screws.
Tighten
Tighten the bolts to 2.2 N.m (20 lb in)
IMPORTANT: The locating tabs on the rotor are necessary for correct alignment of the rotor. If the tabs are missing or damaged, replace the rotor with new rotor.
4. Install the rotor onto the reluctor wheel.
5. Install new rotor screws.
Tighten
Tighten the screws to 19.5 N.m (16.5 lb in)
6. Install the distributor cap.
7. Install new distributor cap screws.
Tighten
Tighten the screws to 2.5 N.m (21 lb in)
8. Connect the CMP sensor harness connector.
9. Connect the spark plug wires and ignition coil wire.
10. Install the engine cover.
11. Connect the negative battery cable.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the engine cover.
3. Disconnect the spark plug wires and ignition coil wire from the distributor.
4. Disconnect the CMP sensor harness connector from the distributor.
5. Remove the distributor cap screws.
6. Remove the distributor cap.
7. Remove the rotor screws.
8. Remove the rotor.
9. Remove the CMP sensor screws.
10. Align the square slot in the reluctor wheel with the CMP sensor.
11. Remove the CMP sensor.
INSTALLATION PROCEDURE
IMPORTANT: Do not use the old cap, CMP sensor, and rotor screws. Use replacement screws that have been coated with a thread locking compound. Precoated replacement distributor cap and CMP sensor screws can be acquired using P/N 10475922 (pkg of 10 screws). Precoated replacement rotor screws can be acquired using P/N 10475924 (pkg of 10 screws).
1. Align the square slot in the reluctor wheel with the CMP sensor.
2. Insert the CMP sensor through the reluctor wheel slot.
NOTE: Refer to Fastener Notice in Service Precautions.
3. Install new CMP sensor mounting screws.
Tighten
Tighten the bolts to 2.2 N.m (20 lb in)
IMPORTANT: The locating tabs on the rotor are necessary for correct alignment of the rotor. If the tabs are missing or damaged, replace the rotor with new rotor.
4. Install the rotor onto the reluctor wheel.
5. Install new rotor screws.
Tighten
Tighten the screws to 19.5 N.m (16.5 lb in)
6. Install the distributor cap.
7. Install new distributor cap screws.
Tighten
Tighten the screws to 2.5 N.m (21 lb in)
8. Connect the CMP sensor harness connector.
9. Connect the spark plug wires and ignition coil wire.
10. Install the engine cover.
11. Connect the negative battery cable.
RENDER: 1.0x
NO RELATED
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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.