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 SYSTEMSCRANKSHAFT POSITION SENSORSERVICE AND REPAIR
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN W
Crankshaft Position Sensor: Service and Repair
1999 Chevrolet Express 1/2 Ton Van V6-4.3L VIN WSECTION Service and Repair
REMOVAL PROCEDURE
IMPORTANT: The CKP System Variation Learn Procedure will need to be performed whenever the Crankshaft Position (CKP) sensor is removed or replaced. Refer to CKP System Variation Learn Procedure.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Disconnect the CKP sensor harness connector.
3. Remove the CKP sensor hold down bolt.
4. Remove the sensor from the timing cover.
5. Inspect the sensor O-ring for wear, cracks or leakage.
Replace if necessary. Lube the new O-ring with clean engine oil before installing.
INSTALLATION PROCEDURE
IMPORTANT: Make certain that the Crankshaft Position (CKP) sensor mounting surfaces are clean and free of burrs before installing the CKP sensor.
When installing a crankshaft position (CKP) sensor make sure the sensor is fully seated and held stationary in the front cover before torquing the hold down bolt into the front cover. A sensor which is not seated may result in erratic operation and lead to the setting of false codes.
1. Install the CKP sensor into the timing cover.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the CKP sensor hold down bolt.
Tighten
Tighten the hold down bolt to 8 N.m (71 lb in).
3. Install the CKP sensor harness connector.
4. Connect the negative battery cable.
5. Perform the CKP System Variation Learn Procedure. Testing and Inspection
IMPORTANT: The CKP System Variation Learn Procedure will need to be performed whenever the Crankshaft Position (CKP) sensor is removed or replaced. Refer to CKP System Variation Learn Procedure.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Disconnect the CKP sensor harness connector.
3. Remove the CKP sensor hold down bolt.
4. Remove the sensor from the timing cover.
5. Inspect the sensor O-ring for wear, cracks or leakage.
Replace if necessary. Lube the new O-ring with clean engine oil before installing.
INSTALLATION PROCEDURE
IMPORTANT: Make certain that the Crankshaft Position (CKP) sensor mounting surfaces are clean and free of burrs before installing the CKP sensor.
When installing a crankshaft position (CKP) sensor make sure the sensor is fully seated and held stationary in the front cover before torquing the hold down bolt into the front cover. A sensor which is not seated may result in erratic operation and lead to the setting of false codes.
1. Install the CKP sensor into the timing cover.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the CKP sensor hold down bolt.
Tighten
Tighten the hold down bolt to 8 N.m (71 lb in).
3. Install the CKP sensor harness connector.
4. Connect the negative battery cable.
5. Perform the CKP System Variation Learn Procedure. Testing and Inspection
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.