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.
2003 Hummer H2 V8-6.0LFACTORY OEM SERVICE PROCEDURE
Vehicle Speed Sensor: Service and Repair
VEHICLE SPEED SENSOR (VSS) REPLACEMENT
REMOVAL PROCEDURE
1. Raise the vehicle. Refer to Vehicle Lifting.
2. Remove the electrical connector from the speed sensor.
3. Remove the speed sensor and the O-ring from the transfer case.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. Install the new rear speed sensor into the transfer case with a new O-ring seal.
Tighten
Tighten the right rear speed sensor to 17 N-m (13 lb ft).
2. Install the electrical connector to the speed sensor.
3. Lower the vehicle. Refer to Vehicle Lifting.
REMOVAL PROCEDURE
1. Raise the vehicle. Refer to Vehicle Lifting.
2. Remove the electrical connector from the speed sensor.
3. Remove the speed sensor and the O-ring from the transfer case.
INSTALLATION PROCEDURE
NOTE: Refer to Fastener Notice in Service Precautions.
1. Install the new rear speed sensor into the transfer case with a new O-ring seal.
Tighten
Tighten the right rear speed sensor to 17 N-m (13 lb ft).
2. Install the electrical connector to the speed sensor.
3. Lower the vehicle. Refer to Vehicle Lifting.
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.