Duramax 6.6L LLY LBZ LMM Turbocharger | 848212-5001S | Garrett GT3788VA | New

New genuine Garrett GT3788VA variable-geometry turbocharger (part number 848212-5001S) for 2004.5–2010 GM 6.6L Duramax diesels with the LLY, LBZ, or LMM engine code. This is a direct drop-in replacement for the factory turbo, supplied new with no core charge and including a new vane position sensor. It restores factory boost and airflow.

Key Features:

• Genuine Garrett GT3788VA variable-geometry turbocharger, part number 848212-5001S
• Fits 2004.5–2010 GM 6.6L Duramax (LLY, LBZ, LMM engine codes)
• New unit — no core charge; includes a new vane position sensor
• Updated center housing with three cobalt VGT pins and nitride-coated unison ring for improved vane actuation and durability
• Completely assembled and VSR-balanced

Specifications:

• Base part number: 848212-5001S (Garrett)
• Turbocharger model: Garrett GT3788VA (variable geometry)
• Component type: Turbocharger assembly
• Condition: New (genuine Garrett) — no core charge
• Engine: GM 6.6L Duramax
• Engine codes: LLY, LBZ, LMM
• Years: 2004.5–2010
• GM references: 97387896, 98011735, 12639460

Compatibility / Fitment:

• Fits 2004.5–2010 GM 6.6L Duramax with LLY, LBZ, or LMM engine codes (Silverado/Sierra 2500/3500 HD, Express/Savana)
• Does NOT fit LB7 (2001–2004) or LML (2011–2016) — those use different turbochargers
• 2004.5–2005 LLY engines require a Vane Position Sensor Adapter to run this turbo
• Includes a new vane position sensor
• Verify your engine code and model year before ordering

Conclusion:

The Garrett 848212-5001S is a new genuine GT3788VA variable-geometry turbocharger for 2004.5–2010 GM 6.6L Duramax engines with the LLY, LBZ, or LMM code. It's a drop-in replacement supplied new with a vane position sensor and no core charge, restoring factory boost. Confirm your engine code and year — and note the LLY adapter requirement — before ordering.