LML Duramax Turbo Actuator 2011-2016 OEM 12643471

Overview

This is a turbocharger actuator / vane position control component for the Chevrolet, GMC LML Duramax diesel (2011-2016). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade LML 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 actuator is what moves them. Soot and heat seize the mechanism or the electronics fail, and the vanes stick — stuck closed gives overboost, a hot turbo and a limp-mode code; stuck open gives no boost, sluggish response and black smoke. Either way the engine cannot make its commanded boost and the ECM logs a turbo underboost, overboost or vane-position fault. A correct replacement actuator restores proper vane control and normal boost response. Note that many actuators must be calibrated to the turbo after installation.

What's Included

• a turbo actuator or vane-position control unit as specified
• mounting hardware and gaskets where included

Fitment

Fits Chevrolet, GMC trucks equipped with the LML Duramax diesel engine, 2011-2016. Please confirm your engine and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this LML Duramax part when you experience:

• a turbocharger underboost, overboost or vane-position code
• limp mode under load
• sluggish throttle response or black smoke
• a sticking or seized variable-geometry actuator

Specifications

• OEM Part Number: 12643471
• Engine: LML Duramax
• Year Range: 2011-2016

Quality & Service

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