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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 10 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 6.6L (LMM) - DTC P0016 TO DTC P0299)DTC P003ACOMPONENT TESTINGTC VANE POSITION SENSOR
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
TC Vane Position Sensor
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION TC Vane Position Sensor
WARNING: This page is about a different variant/trim than selected.
- Ignition OFF, remove the TC vane position sensor.
- Connect the harness connector to the TC vane position sensor.
- Ignition ON, slowly depress the button on the end of the TC position sensor while observing the TC Vane Position Sensor parameter on the scan tool for a smooth decreasing percentage from 100-0 percent without any spikes or dropouts.
- If the TC Vane Position Sensor parameter is erratic, replace the TC vane position sensor.
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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.