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 MANUALSCHEVROLET1997ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSKNOCK SENSOR MODULESERVICE AND REPAIR
1997 Chevrolet Astro Van 2WD V6-4.3L VIN W
Knock Sensor Module: Service and Repair
1997 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Service and Repair
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Remove the connectors from the VCM.
3. Remove the mounting hardware.
4. Remove the VCM from the engine compartment.
5. Remove the VCM access cover.
CAUTION: Do not remove the cover of the Knock Sensor (KS) Calibration PROM. Use of an unapproved KS Calibration PROM removal methods may cause damage to the KS Calibration PROM or the socket.
IMPORTANT: The replacement VCM is supplied without a KS Calibration PROM so for reuse in the new VCM carefully remove the PROM from the defective VCM.
6. Remove the Calibration PROM.
^ Using the thumb and first finger, remove the KS Calibration PROM by gently squeezing each end of the blue KS Calibration PROM and pull upward.
7. Inspect for the alignment notches of the KS Calibration PROM.
8. Carefully set it aside.
9. Do not open the KS Calibration PROM.
INSTALLATION PROCEDURE
IMPORTANT: Press only on the ends at the KS Calibration PROM. The small notches in the KS Calibration PROM must align with the small notches in the KS Calibration PROM socket. Gently press on the KS Calibration PROM until it is firmly seated in the socket. Listen tar the click.
1. Install the KS Calibration PROM in the KS Calibration PROM socket.
2. Install the access cover on the VCM.
3. Install the VCM in the engine compartment.
4. Install the connectors to the VCM.
5. 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.