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 MANUALSCHEVROLET2005BLAZER 4WD V6-4.3L VIN XREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOIL PRESSURE SENSORSERVICE AND REPAIR
2005 Chevrolet Blazer 4WD V6-4.3L VIN X
Oil Pressure Sensor: Service and Repair
2005 Chevrolet Blazer 4WD V6-4.3L VIN XSECTION Service and Repair
Engine Oil Pressure Sensor and/or Switch Replacement
^ Tools Required
- J 41712 Oil Pressure Switch Socket
Removal Procedure
1. Important: Clean the area around the sensor and Distributor before removal. Do not allow debris to enter the engine.
Remove the distributor.
2. Disconnect the engine oil pressure sensor electrical connector.
3. Remove the engine oil pressure sensor using the J 41712.
4. Important: Note the alignment of the engine oil pressure sensor fitting prior to removal.
Remove the engine oil pressure sensor fitting, if necessary.
Installation Procedure
1. Apply sealant GM P/N 12346004 (Canadian P/N 10953480) or equivalent to the threads of the fitting and/or the engine oil pressure sensor.
2. Notice: Refer to Fastener Notice in Service Precautions.
Install the engine oil pressure sensor fitting, if removed.
^ Tighten the engine oil pressure sensor fitting to 15 Nm (11 ft. lbs.).
3. Install the engine oil pressure sensor.
^ Using the J 41712, tighten the engine oil pressure sensor to 30 Nm (22 ft. lbs.).
4. Connect the engine oil pressure sensor electrical connector.
5. Install the distributor.
6. Check and adjust engine oil level.
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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.