Engine Family:
6.6L Duramax diesel (Duramax 6600)
RPO Code:
L5P
VIN Code:
Y (8th digit of VIN)
Assembly Site:
DMAX engine plant, Moraine, Ohio
Applications/Production Years:
2017 - current Chevrolet Silverado 2500HD, 3500HD
2017 - current GMC Sierra 2500HD, 3500HD
Displacement:
6.599 liters (6.6 liters nominal), 402.62 CID (403 CID nominal)
Configuration:
90 degree V-8
B10 Life:
Not specified
B50 Life:
Not specified
Bore:
4.055 inches (103.00 mm)
Stroke:
3.897 inches (99.00 mm)
Bore/Stroke Ratio:
1.04 (marginally oversquare)
Compression Ratio:
16.0 : 1
Firing Order:
1-2-7-8-4-5-6-3
6.6L Duramax L5P cylinder numbers
Engine Block Material:
Cast iron with induction hardened cylinder walls
Cylinder Head Material:
Cast aluminum alloy
Injection System:
Direct injection
High pressure common rail system
Denso GS4 Gen-III solenoid fuel injectors (up to 7 injection events per combustion sequence)
Denso HP4 injection pump
29,000 psi max injection pressure
Aspiration:
Turbocharged, air-to-air intercooler
BorgWarner model B2BV-70A electronically actuated variable geometry turbocharger (VGT)
Reciprocating Assembly:
Cast aluminum alloy pistons w/ "re-melt" piston bowl rim
Cast nodular iron main bearing caps
Forged steel crankshaft
Steel camshaft
Powdered metal iron connecting rods
Valvetrain:
Overhead valve (OHV), standard cam-in-block, mechanical roller lifters
4 valves per cylinder (32 valve)
Cold Start Aid(s):
Traditional glow plug system, 1 per cylinder, ceramic glow plugs
Engine Oil Capacity:
10 quarts with oil filter change
Engine Oil Spec:
See viscosity chart at 6.6L Duramax L5P service guide
Lube Oil Filter P/N:
ACDelco PF2232
Fuel:
Ultra low sulfur diesel (ULSD) or max B20 biodiesel blend
Peak Horsepower:
445 hp @ 2,800 rpm
Peak Torque:
910 lb-ft @ 1,600 rpm
Idle Speed:
Engine idle speed will vary with conditions that include electrical demand, regeneration status, and engine temperature; idle speed may be as low as 600 rpm.
Governed Speed:
3,450 rpm (electronically governed maximum run speed)
4,800 rpm (electronically governed maximum engine braking speed)
Emissions Equipment:
Selective cataytic reduction (SCR, requires diesel exhaust fluid), diesel particulate filter (DPF), diesel oxidation catalyst (DOC), exhaust gas recirculation (EGR) w/ intake throttle
Coupled Transmissions:
Allison 1000 six speed automatic, GM-Allison 10L1000 10 speed automatic
Engine Weight:
Approx. 835 lbs
Engine Dimensions:
Length:
31.8 inches
Width:
35.4 inches
Height:
39.1 inches
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