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.
2009 Hummer H3 V8-5.3LFACTORY OEM SERVICE PROCEDURE
Vehicle Speed Sensor: Service and Repair
Vehicle Speed Sensor Replacement
Removal Procedure
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Disconnect the vehicle speed sensor (VSS) electrical connector (2).
3. Remove the VSS with O-ring seal.
Installation Procedure
Caution: Refer to Component Fastener Tightening Caution (Component Fastener Tightening Caution).
1. Install the VSS with O-ring seal.
Tighten the vehicle speed sensor (VSS) to 17 Nm (13 lb ft).
2. Connect the VSS electrical connector (2).
3. Lower the vehicle.
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.
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