L5P Duramax 6.6L V8 Turbo Diesel

6.6-літровий дизельний двигун V8 з турбонаддувом, відомий своєю потужністю та надійністю, використовується в важких вантажівках Chevrolet.

Brand: Chevrolet Type: Diesel Configuration: V8 Production Years: 2017 - теперішній час Production: Flint, Michigan, USA
60 Brand engines
5 Modifications

Technical Specifications

Engine Displacement 6.6 L (6,599 cc)
Configuration V8
Number of Cylinders 8
Valves per Cylinder 4
Power 445 л.с.
Torque 1234 Н*м
Cylinder Bore 103.00 mm
Piston Stroke 99.00 mm
Compression Ratio 16.0:1
Firing Order 1-2-7-8-4-5-6-3
Fuel System Direct Injection
Aspiration Turbocharged
Turbocharger Variable Geometry Turbocharger
Intercooler Yes
Maximum RPM 3,400 rpm
Max Torque RPM 1,600 rpm
Valve Train OHV
Timing Drive Chain
Timing Chain Replacement 250000 or as needed
Block Material Cast Iron
Head Material Aluminum
Engine Weight 450 kg
Dimensions (L×W×H) null mm
Lubrication System Pressure lubrication
Cooling System Liquid cooling

Additional Information

Engine Family Duramax
Manufacturing Plant Flint, Michigan, USA
Predecessor LML

Maintenance

Engine Oil Capacity 9.5 L (with filter: 10 L)
Recommended Viscosity 15W-40
Oil Standard API CK-4
Recommended Brands Mobil Delvac, Shell Rotella, Valvoline Premium Blue
Oil Change Interval 15 000 km or 12 mo
Oil Filter 12640445
Air Filter 84390973
Replace every 60 000 km
Fuel filter 84128519
Cabin Filter 84141502
Spark Plugs
Coolant Capacity 25 L
Coolant Type DEX-COOL (ACDelco)
Coolant Change Interval 240 000 km
Thermostat Opening Temperature 88°C
Operating Temperature 90°C
Max Operating Temperature 110°C
Critical Temperature 120°C
Annual Maintenance Cost 1000-1500 USD

Reliability

Reliability rating: 9/10

Expected lifespan: 500 000 km

Common problems

Problem Severity Mileage Repair cost
Fuel injector failure Medium 150000-200000 km $1000-2000
Turbocharger issues High 200000-250000 km $2000-4000

Known defects

  • Early models had EGR cooler issues
  • Some reports of DEF system failures

Warranty extensions

  • Chevrolet extended warranty for emissions components up to 8 years/130000 miles

Tuning potential

Tuning potential: High | Max. safe power: 650 hp

Stage Power Torque Method Cost
Stage 1 500 hp 1400 Nm ECU remap
Reliability impact: Minimal 		$800
Stage 2 550 hp 1500 Nm ECU, Exhaust, Intake
Required: Upgraded intercooler, Exhaust system, ECU remap
Reliability impact: Low 		$3000
Stage 3 600 hp 1600 Nm -
Required: Bigger turbo, Forged internals, Upgraded fuel system
Reliability impact: Medium-High 		$10000

Popular modifications

  • Cold air intake
  • Performance exhaust
  • ECU tuning

Tuning limitations

  • Transmission limitations above 600hp
  • Cooling system upgrades needed for high power

Cars with the L5P engine

This engine was fitted to 3 models

Photo Brand Model Generation Production years
No photo
 Chevrolet Express Express 2003 - present
No photo
 Chevrolet Silverado Silverado III 2014 - 2018
No photo
 GMC Savana Savana (GMT610) 1996 - present

All modifications (5)

Vehicle Generation Modification Power Gearbox Drive
Chevrolet Express Express 6.6L V8 Duramax 445 л.с. 6-Автомат 2WD 445 hp 6-Автомат 2WD
Chevrolet Express Express 6.6L V8 Duramax 445 л.с. 6-МКП 2WD 445 hp 6-МКП 2WD
Chevrolet Silverado Silverado III Дизель 6.6L V8 445 л.с. 6-Автомат 2WD 445 hp 6-Автомат 2WD
Chevrolet Silverado Silverado III Дизель 6.6L V8 445 л.с. 6-Автомат 4x4 445 hp 6-Автомат 4x4
GMC Savana Savana (GMT610) 6.6L V8 Duramax 445 л.с. 6-Автомат 4x4 445 hp 6-Автомат 4x4

Interesting Facts

  • The L5P is the most powerful Duramax engine produced by GM.
  • It features a new, stronger cylinder block and rotating assembly compared to its predecessor.

Applications

Total produced: Over 500,000

Vehicle Generation Years Power Markets
Chevrolet Silverado 2500HD 4th Gen 2017-present 445hp North America
Chevrolet Silverado 3500HD 4th Gen 2017-present 445hp North America

Compatible transmissions: Allison 10-speed Automatic

Drive types: 4WD, RWD

Fuel Economy

Fuel Type Diesel
Consumption (City) 15 L/100km
Consumption (Highway) 10 L/100km
Consumption (Combined) 12.5 L/100km
Real Consumption 13.5 L/100km
Fuel Tank Capacity 136 L
Range 1,088 km
Cost per 100 km 20-25 USD

Emissions Standards

Emission Standard EPA Tier 3
CO₂ Emissions 295 g/km
Particulate Filter (DPF) Present
Regeneration every 800 km
AdBlue Required
Consumption: 1 L/1000km

Awards and Recognition

  • Ward's 10 Best Engines (2017) — Heavy-Duty Truck Engines

Comparison with competitors

Engine Brand Displacement Power Torque
6.7L Power Stroke Ford 6,700 cc 475 hp 1424 Nm
6.7L Cummins Ram 6,700 cc 420 hp 1424 Nm

Pros

  • Higher power output compared to competitors
  • Strong aftermarket support
  • Durable and reliable for heavy-duty use

Cons

  • Higher initial cost
  • Complex emissions system can be costly to repair