Turbo Vane Position Sensor Kit – Fits 2004.5–2015 GMC Sierra 2500HD/3500HD | 6.6L Duramax LLY LBZ LMM LML | Plug & Play | Replaces 12643471

Turbo Vane Position Sensor Kit – 6.6L Duramax LLY LBZ LMM LML

This turbo vane position sensor kit is designed for 2004.5–2015 GMC Sierra trucks equipped with the 6.6L Duramax diesel engine. It accurately detects the position of turbocharger vanes to optimize boost control and prevent diagnostic trouble codes (DTCs).

Key Benefits

• Restores accurate turbo vane feedback for ECM calibration
• Prevents P003A and related turbo position error codes
• Plug-and-play installation with OE-style connectors
• Includes adapter for 2004–2005 LLY harness compatibility
• Durable construction for harsh diesel environments

Fitment Compatibility

• 2004.5–2005 GMC Sierra – 6.6L LLY Duramax
• 2006–2007 GMC Sierra – 6.6L LBZ Duramax
• 2007.5–2010 GMC Sierra – 6.6L LMM Duramax
• 2011–2015 GMC Sierra – 6.6L LML Duramax
• ⚠️ 2004–2005 LLY requires adapter for newer harness style

What's Included

• Turbo vane position sensor
• Adapter harness for LLY compatibility
• Mounting hardware (if applicable)

Notes

• Direct replacement for OE part numbers: 12643471, 12635324, 904-235, 763527-0512
• Easy installation – no calibration required
• For off-road diagnostics and performance tuning
• Not intended to bypass emissions systems

Unlock Turbo Precision & Diagnostic Reliability

Replacing a faulty turbo vane sensor restores proper boost control and eliminates common ECM error codes. Ideal for diesel owners performing off-road tuning, diagnostics, or turbo upgrades.