DEF Turbocharger Vane Position Sensor Kit for 6.6L Duramax (2004.5–2015) — Direct-Fit, Plug-and-Play OEM Replacement

This DEF Turbo Charger Vane Position Sensor Kit accurately detects turbo vane position for Chevy and GMC 6.6L Duramax engines (2004.5–2015), restoring proper turbo control and drivability.

If your Silverado or Sierra 2500/3500 HD with a Duramax LLY, LBZ, LMM or LML is showing turbo-related faults, poor spool behavior, or diagnostic codes tied to vane control, this direct-fit sensor kit is a common replacement. Designed as a plug-and-play OEM-style component, it replaces part numbers such as 12643471, 12635324, 904-235 and 763527-0512 to give technicians and DIY owners a straightforward path to repair without modification.

How does this sensor kit restore turbocharger performance?

The vane position sensor monitors the angle of the variable-geometry turbo vanes so the engine control module can adjust boost and exhaust flow precisely. When the sensor provides accurate feedback, the turbo control actuator responds correctly, improving spool, throttle response and reducing error codes. Replacing a failed sensor eliminates false vane readings that can cause limp mode or inconsistent boost.

• Direct replacement for common OEM part numbers (12643471, 12635324, 904-235)
• Works with actuator feedback loops to optimize vane angle
• Plug-and-play harness for quick swap and minimal downtime

Will this kit fit my Chevy or GMC 6.6L Duramax between 2004.5 and 2015?

Yes — the kit is specified for Silverado and Sierra 2500/3500 HD models with Duramax engines LLY, LBZ, LMM and LML in the 6.6L family produced from 2004.5 through 2015. It’s engineered to match the factory sensor’s mounting and electrical connector so no vehicle-specific rework is required. Verify compatibility by checking your vehicle’s engine code and the OEM part reference numbers.

• Compatible engines: LLY, LBZ, LMM, LML 6.6L Duramax
• Model fitment: Silverado & Sierra 2500/3500 HD (2004.5–2015)
• Cross-references included for quick verification

How difficult is installation and what tools are required?

Installation is straightforward for most mechanically inclined owners and professional techs because the kit is plug-and-play. Typical install requires basic hand tools to access the turbocharger area and disconnect the old sensor, then plug in the new sensor and secure it to the turbo housing. No programming or special calibration is usually required; clearing stored codes after replacement can be done with a standard OBD-II scanner.

• Basic mechanics tools: ratchet, sockets, and screwdrivers
• No reprogramming expected; clear codes after install
• Designed for direct fit to existing turbo harness and mounting

What part numbers does this kit replace and why is that important?

This DEF kit replaces common OEM numbers like 12643471, 12635324, 904-235 and 763527-0512 so you can be confident it matches factory specifications and electrical connections. Cross-referenced part numbers simplify ordering and ensure you pick a compatible component for your turbo control system. Using the correct replacement prevents fitment issues and avoids incorrect sensor signals that can trigger fault codes.

• Replaces: 12643471, 12635324, 763527-0512, 904-235
• Includes kit components sized for factory mounting points
• Helps avoid diagnostic confusion from mismatched parts

Who is this for: This sensor kit is aimed at owners and technicians working on Chevrolet and GMC heavy-duty trucks equipped with 6.6L Duramax engines from 2004.5–2015 who need an OEM-style vane position sensor replacement. It’s especially useful for shops diagnosing vane-related turbo faults, fleet maintenance teams minimizing downtime, and DIYers comfortable performing turbo-area repairs and clearing OBD-II codes. Choosing the correct cross-reference part reduces troubleshooting time and restores proper turbo feedback control.