Everything we know about the 2020 Chevy Silverado 3.0L Duramax Turbo Diesel I-6 Engine
2020 Chevrolet Silverado 3.0l Duramax Turbo Diesel I-6 Engine Specs

FUEL EFFICIENCY
Est. 33 MPG Highway
CAPABLE HORSEPOWER
277 Horse Power
POWERFUL TORQUE
460 LB.-FT.
ADVANCED TECHNOLOGY
The 3.0L Duramax Turbo Diesel I-6 engine offers a new powertrain choice that exhibits impressive efficiency, power and advanced technology.
Fuel Efficiency
10-Speed Transmission
- 10-speed transmission helps keep the engine RPMs in the middle of its power band for maximum power and fuel efficiency
- Intelligent controls automatically adjust to the driver’s needs for ideal operation and response
- 10 speeds provide a more refined driving experience with smoother gear changes
- Smaller ratio steps between gears allow the engine to operate more efficiently
Combustion System
- 15.0:1 compression ratio with up to 10 injections per cycle per injector means the engine works harder when needed without sacrificing fuel efficiency
- High compression and multiple injections contribute to both efficiency and smooth operation
Direct Common Rail Fuel Injection System
- High pressure fuel injectors provide a super-fine spray, for efficient combustion that enhances both performance and mileage
Lubrication System
- Electronically controlled variable displacement oil pump for maximum engine efficiency
- Pistons cooled by oil jets using 7 quarts of low-friction dexos® 0W20 diesel engine oil
Horse Power and Torque
Fast Response Turbocharger
- Low-end power is what diesel engines are all about, and the Duramax’s turbo ensures there’s plenty of power on tap
- Variable geometry turbocharger maximizes boost (up to 29 PSI) at low engine RPM—perfect for effective freeway merging
- Ball bearing shaft and short air circuit eliminate turbo lag
Lightweight and Compact
- Lightweight components improve efficiency while compact engine design allowed Silverado’s engineers to design a naturally-balanced inline 6-cylinder engine; there’s no need for complex balance shafts, unlike the competition’s V6 diesels
- Engine block is made from lightweight cast aluminum alloy, making it more efficient with less weight
- Camshaft drive on rear of engine allows an inline 6-cylinder engine design
Cylinder Head and Valvetrain
- Inline design means fewer moving parts with better engine response and reliability, while retaining the “breathing” efficiency of four valves per cylinder
- Fewer components produce less friction and improve acceleration
- Four valves per cylinder provide increased airflow and more power
- Chain-driven camshafts and fuel pump for durability in the Silverado 3.0L Duramax
High Performance Engine Components
- Engine materials, dimensions and manufacturing processes were all carefully selected to ensure the long service life you expect from a Duramax diesel
- Forged steel crankshaft with rolled fillets for durability
- Induction hardened crank pins and timing drive sprocket
- Forged steel fractured connecting rods
- 30mm-diameter piston pins with diamond-like carbon coating
- Trimetal main and rod bearings
Advanced Technology
Active Thermal Management
- Even the cooling system pitches in to ensure the engine, transmission, turbocharger, intake air, fuel, DEF and passengers are all kept at optimum temperatures
- Engine warms up quickly while maintaining ideal performance and minimal fuel consumption
- Faster warm-up to reduce friction and optimize engine and transmission temperatures
Water Charge Air Cooler
- Charge Air Cooler cools compressed air going into the engine for even better power
- Installed on the Silverado 3.0L Duramax for quick response with dedicated cooling circuit and electric pump
- Reduces intake air temperature by up to 130° F
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