ACDelco 40009146 Genuine GM Parts Turbocharger Assembly for 2.8L Duramax LWN Diesel

The ACDelco 40009146 is a genuine GM original equipment turbocharger assembly designed specifically for the 2.8L Duramax LWN inline-four turbodiesel engine. This factory-engineered turbocharger is a critical component that enables the 2.8L Duramax to produce 181 horsepower at 3,400 RPM and an impressive 369 lb-ft of torque at 2,000 RPM.

Key Features:

• Variable-geometry turbocharger design for optimal power and efficiency across the entire RPM band
• Water-cooled construction reduces heat under heavy loads and high-speed operation for enhanced durability
• Dedicated oil feed line from the engine's oiling circuit provides increased pressure and faster oil delivery to the turbocharger bearings
• Precision-engineered compressor wheel optimized for performance at higher altitudes in North American conditions
• Factory original equipment quality built to GM's rigorous safety and performance standards
• Direct replacement for OEM part numbers 55486936, 55506040, and 55510315

As a genuine ACDelco GM part, this turbocharger assembly is manufactured to the exact specifications used in vehicle production and is backed by GM's replacement parts limited warranty. The variable-geometry design allows the turbocharger to adjust vane angles for optimal boost pressure throughout the engine's operating range, delivering the broad torque band that makes the 2.8L Duramax exceptionally powerful at low RPM while providing smooth, immediate horsepower on demand. The water-cooling feature significantly improves reliability and longevity compared to conventional air-cooled designs, especially during sustained towing or heavy-duty operation.

This turbocharger assembly is a complete unit ready for installation, ensuring proper fitment and performance in your GM diesel engine application.