LMM Duramax Turbo Vane Position Sensor 2007.5-2010 OEM 12643471

Overview

This is a turbocharger vane position sensor for the Chevrolet, GMC LMM Duramax diesel (2007.5-2010). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LMM Duramax repair or service. Every order ships fast and is backed by our support team.

What It Does & How It Helps

A variable-geometry turbo controls boost by moving vanes inside the turbine housing, and the vane position sensor is what tells the ECM where those vanes actually are. It does not move the vanes itself — it reports their position, and the ECM trims the turbo against that reading. The sensor sits in the heat and soot at the turbo and its signal drifts or drops out as it ages. When it does, the ECM no longer knows the true vane position: it commands the wrong correction, and the truck goes into limp mode or logs a vane-position performance code even though the turbo hardware itself is sound. A correct replacement sensor restores an accurate position signal so the ECM can control boost properly again. Note that this is the position SENSOR, not the actuator that drives the vanes — if your vanes are mechanically seized, the sensor is not the repair.

What's Included

• the turbocharger vane position sensor with its lead and connector
• the adapter harness, heat shield and retaining clamp as shipped by the maker

Fitment

Fits Chevrolet, GMC trucks equipped with the LMM Duramax diesel engine, 2007.5-2010. Please confirm your engine and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this LMM Duramax part when you experience:

• a turbo vane position sensor performance or circuit code
• limp mode or a boost fault with no mechanical turbo damage found
• erratic boost control or unstable turbo response
• a sensor signal that drops out when the turbo is hot

Specifications

• OEM Part Number: 12643471
• Engine: LMM Duramax
• Year Range: 2007.5-2010

Quality & Service

Fast shipping on in-stock orders. Free shipping on orders over $70. Backed by Core Diesel Parts — your source for LMM Duramax diesel parts.