Electronically Controlled, Variable-Geometry Turbocharging System• Advances the Duramax legacy of variable-geometry boosting, creating more power

in the engine

• Revised design enhances the capability of the exhaust-brake system

• New variable-vane turbocharger enables the engine to deliver more power with

lower exhaust emissions

Venturi Jet Drain Oil Separator• First of its type in the new Duramax 6.6L

• Designed to ensure oil control in sustained full-load operation

• Totally sealed system that collects misted oil entrained in the blow-by gas, allowing

for re-use in the engine

• Less sophisticated systems result in oil carryover into the cylinders during combustion

Cold-Start System• Provides outstanding cold-weather performance

• Enhanced ceramic glow plugs and automatic temperature compensation provide

robustness and capability

ADDITIONAL FEATURES

• Stronger cast-iron cylinder block

and aluminum cylinder heads

• Stronger micro-alloy rotating and

reciprocating assembly

• Increased oil-flow and coolant-

flow capacity

• Segment-first re-melt piston

bowl rim

• Exhaust Gas Recirculation system

with single cooler and integrated

bypass

• Electrically actuated/electronically

controlled turbocharging system

• Advanced solenoid fuel system

• Redesigned electronic controls

• Full-length damped steel oil pan

that contributes to quietness

• Rocker cover/fuel system

acoustical treatments

• B20 biodiesel compatibility

THE MISSION-ACCOMPLISHING TURBOCHARGED DIESEL

STATE-OF-THE-ART TECHNOLOGIES

6.6L L5P

The all-new L5P Duramax 6.6L turbo-diesel engine advances General Motors’ legacy for

powerful, quiet, and durable diesels by offering more of those attributes with greater efficiency.

It’s an all-new, clean-sheet redesign developed wholly by General Motors.

This next-generation redesign offers more horsepower and torque than ever to enable

easier, more confident hauling and trailering. Higher boost pressure from the turbocharger,

compared with the previous engine, helps the L5P produce more power.

Along with a 19-percent increase in max torque over the current Duramax 6.6L, the redesigned

turbo-diesel’s performance is quieter and smoother, reducing noise at idle by 38 percent.

6.6L V-8 (L5P)*

HO

RSEP

OW

ER (h

p)

TORQ

UE

(lb-

ft)

ENGINE SPEED (rpm x 100)

SPECIFICATIONS6.6L L5P

TYPE: 6.6L V-8 L5P Turbo-Diesel

DISPLACEMENT: 403 ci

ENGINE ORIENTATION: Longitudinal

COMPRESSION RATIO: 16.0:1

VALVE CONFIGURATION: Overhead valves

VALVES PER CYLINDER: 4

ASSEMBLY SITE: Moraine, Ohio

VALVE LIFTERS: Mechanical roller

FIRING ORDER: 1-2-7-8-4-5-6-3

BORE X STROKE: 103 x 99 mm

FUEL SYSTEM: DI with high-pressure common rail

FUEL TYPE: Ultra-low sulfur diesel and B20 biodiesel

MAXIMUM POWERED SPEED: 3450 rpm

MAXIMUM BRAKING SPEED: 4800 rpm

EMISSIONS CONTROLS: Cooled Exhaust Gas Recirculation (EGR)

Selective Catalytic Reduction (SCR)

Diesel Particulate Filter (DPF)

Intake throttle

HORSEPOWER: 445 hp (332 kW) @ 2800 rpm*

TORQUE: 910 lb-ft (1234 Nm) @ 1600 rpm*

BLOCK: Cast iron

CYLINDER HEAD: Cast aluminum

INTAKE MANIFOLD: Cast aluminum

EXHAUST MANIFOLD: Cast nodular iron with steel pipe extension

MAIN BEARING CAPS: Cast nodular iron

CRANKSHAFT: Forged steel

CAMSHAFT: Steel

CONNECTING RODS: PM iron

ENGINE OIL CAPACITY: 10qt/9.5L

*As tested in the Chevrolet Silverado HD and GMC Sierra HD.

gmpowertrain.com

Information may vary with application. All specifications listed are based on the latest product information available at the time of publication. The right is reserved to make changes at any time without notice. ©2017 General Motors. All rights reserved. The marks appearing in this ad are the trademarks or service marks of GM, its subsidiaries, affiliates, or licensors.

445 hp (332 kW)@ 2800 rpm

910 lb-ft (1234 Nm) @ 1600 rpm