Description

The Garrett GT3788VA Turbocharger is a premium replacement turbo designed for Duramax 6.6L diesel engines , including LLY, LBZ, and LMM platforms used in Chevy and GMC heavy-duty trucks. Built to meet or exceed OEM standards, this turbocharger restores factory-level boost pressure, improves airflow, and enhances throttle response and engine efficiency. Featuring turbo model GT3788VA and part number 8973525643 , this unit offers robust construction with precision-balanced internals and durable bearings designed for long-lasting performance under demanding towing and hauling conditions. The direct-fit design ensures easy installation with no modification required, making it ideal for fleet vehicles, work trucks, and daily drivers seeking dependable Duramax performance. Whether replacing a worn turbo or upgrading from a low-performance unit, the Garrett GT3788VA turbocharger delivers improved power delivery, reduced turbo lag, and consistent torque across the RPM range. KEY FEATURES Genuine Garrett GT3788VA turbocharger Fits Duramax 6.6L diesel engines — LLY, LBZ, LMM OEM-style performance with part number 8973525643 Restores factory boost and engine power Precision-balanced rotating assembly Durable construction for heavy-duty use Direct-fit replacement — no modification required Improves throttle response and efficiency APPLICATION Engine Family: Duramax 6.6L Compatible Engine Codes: LLY, LBZ, LMM Vehicles: Chevy/GMC Heavy Duty (e.g., Silverado/Sierra 2500HD, 3500HD) Use Case: Towing, hauling, commercial & daily driving PART NUMBERS Garrett: GT3788VA Reference / OE: 8973525643