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.
2008 Hummer H3 V8-5.3LFACTORY OEM SERVICE PROCEDURE
Oil Pressure Sensor: Service and Repair
Engine Oil Pressure Sensor and/or Switch Replacement
Tools Required
J 41712 Oil Pressure Switch Socket
Removal Procedure
1. Remove the intake manifold. Refer to Intake Manifold Replacement (Intake Manifold Replacement) .
2. Disconnect the oil pressure sensor electrical connector (1).
3. Using J 41712 or equivalent, remove the oil pressure sensor.
Installation Procedure
1. Apply sealant to the threads of the oil pressure sensor. Refer to Adhesives, Fluids, Lubricants, and Sealers (Sealers, Adhesives, and Lubricants) for the correct part number.
Notice: Refer to Fastener Notice (Fastener Notice) .
2. Using J 41712 or equivalent, install the oil pressure sensor.
Tighten the sensor to 35 N.m (26 lb ft).
3. Connect the oil pressure sensor electrical connector (1).
4. Install the intake manifold. Refer to Intake Manifold Replacement (Intake Manifold Replacement) .
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.