L5P Duramax Specs, MPG, MPH, HP, Torque, Towing Capacity, Warranty, Reliability and Application

The L5P Duramax engine is one of the most powerful and reliable diesel engines. This engine was first introduced by General Motors in 2017, and it has been a popular choice for heavy-duty pickup trucks ever since. This article will look in-depth at the L5P Duramax specs, including its horsepower, Capacity, warranty, Reliability, MPG, MPH, HP, Torque, Towing and Vehicle Application.

Suppose you’re considering purchasing a truck with an L5P Duramax engine or are curious about its capabilities. In that case, this comprehensive guide to its specs will provide all the information you need.

Vehicle Application of Duramax L5P Engine:

L5P Duramax Specs

The Duramax L5P engine has been a game-changer in the heavy-duty truck industry since its initial release in 2017. This powerful engine is currently being used in the Silverado and GMC Sierra 2500HD and 3500HD models, offering drivers an impressive combination of performance and durability. With up to 445 horsepower and 910 lb-ft of torque, this engine can easily handle even the most challenging jobs.

The derivative of the L5P, known as the L5D, is now used in Chevrolet Silverado 4500HD, 5500HD and 6500HD trucks. This new powertrain brings enhanced performance and efficiency to these tough workhorses.

L5P Duramax Specs:

Duramax L5PSpecs
Manufacturing YearFrom 2017 to date
Engine RPO CodeL5P
Assembled inMoraine, Ohio, United States of America
Manufactured ByGeneral Motors Collaborated with Isuzu Motors
Used InChevrolet Silverado and GMC Sierra 2500HD and 3500HD
Displacement6.6L/403 cu. In
Engine TypeTurbo-diesel V8 engine
Engine Weight835 pounds (378.75 kilograms)
Fuel SystemDirect injection
Fuel PressureHigh-pressure common rail
Transmission10-Speed Allison Transmission
Horsepower445 hp @ 2800 RPM
Torque910 lb. Ft. @ 1600 RPM
Bore and Stroke Size103 x 99 mm
Firing Order1-2-7-8-4-5-6-3
Maximum RPM3450
Emissions ControlsSCR, EGR, DPF
Intake Manifold MaterialAluminum
Cylinder Head MaterialAluminum
Valves Per Cylinder4
Engine BlockCast iron
Fuel TypeDiesel (Ultra low sulfur diesel and B20 biodiesel)
Maximum Braking Speed4800 RPM
Connecting RodPowered Metal Iron or PM iron
CrankshaftForged steel
Configuration of the ValveOverhead
Compression Ratio16.0:1
Cold Start AidCeramic Glow Plug in every Cylinder

Now We see all specs in detail.

Duramax L5P Specs:

Duramax L5P Transmission System:

The Duramax L5P engine is one of the latest additions to GM’s lineup, featuring a 10L 1000 Allison 10 Speed Automatic Transmission System. This powerful combination offers unparalleled efficiency, durability, and performance in any road condition.

L5P Duramax Towing Capacity:

Duramax L5P Specs:

Towing capacity is one of the most important factors when buying a heavy-duty truck. With the L5P engine, Silverado and GMC Sierra 2500HD and 3500HD can tow an impressive amount of weight.

The Silverado and GMC Sierra 2500HD have a maximum towing capacity of up to 18500 pounds or 8392 kilograms, while the Silverado and GMC Sierra 3500HD can tow up to 20000 pounds or 9072 kilograms.

L5P Duramax Fluid Capacity:

L5P Duramax Fluid Capacity:

Here are the different fluid capacity lists of L5P engines-

Duramax L5PFluid Capacity
DEF Fluid Capacity26.5 Liters or 7 Gallons
Coolant Capacity29.7 Liters or 31.4 Quarts
Automatic Transmission Fluid7 litres or 7.4 Quarts
Transfer Caseis1.5 Liters or 1.6 Quarts
Low-Temperature Circuit Cooling Fluid Capacity3.5 Liters or 3.7 Quarts
Power Steering Fluid2 Liters or 2.1 Quarts

L5P Duramax Engine Weight:

Duramax is available in four engine displacement variants, including 6.6L, 3.0L, 2.8L, and 2.5L engines. With twelve RPO codes available, the Duramax engine offers a range of options to suit different needs.

Here are the all-variants engine weights of Duramax.

Duramax ModelsEngine Weight
Duramax 6.6835 pounds or 378.75 kilograms
Duramax 3.0467 pounds or 211.83 Kilograms
Duramax 2.8520 pounds or 235.87 kilograms
Duramax 2.5450 pounds or 204.12 kilograms

L5P Duramax Vehicles Weight:

L5P Duramax Vehicles Weight:

The Duramax L5P engine is a powerful and reliable diesel engine used in the GMC Sierra and Chevrolet Silverado 2500HD and 3500HD.

So, the weight is more than other vehicles model.

Duramax ModelsVehicle Weight
L5P GMC Sierra 2500HD5741 pounds or 6689 kilograms
L5P Chevrolet Silverado 2500HD5741 pounds or 6689 kilograms
L5P GMC Sierra 3500HD5985 pounds or 6717 kilograms
L5P Chevrolet Silverado 3500HD5985 pounds or 6901 kilograms

L5P Duramax Torque Specs:

The newest variant boasts an impressive 910 lb.ft.@ 1600 RPM, a major upgrade from its predecessor, the LML engine variant that only produced 765 lb.ft.@ 1600 RPM. At first glance, this may not seem like a considerable difference, but it translates to an increase of 145 lb. ft. torque at the same RPM as its predecessor.

L5P Duramax HP:

The Duramax LML engine features an impressive 397 horsepower at 2800 RPM, while its successor, the Duramax L5P engine, boasts a remarkable 445 horsepower at 2800 RPM. This means the L5P engine has an increased horsepower of 48 compared to its predecessor.

Duramax L5P MPG:

One of the critical features of this engine is its impressive mileage, making it an ideal choice for drivers looking for both power and fuel economy. The Mileage of L5P is 22 on the road and on the city 17.

0-60 in L5P Duramax:

The L5P Duramax engine produces an incredible 910 lb. ft of torque at just 1600 RPM, making it one of the most powerful engines today.

 This engine is used in the Silverado, Sierra 2500HD, and 3500HD trucks, allowing these vehicles to handle heavy loads and easily provide impressive acceleration times.

The 2500HD version of the L5P engine can go from 0-60 MPH in just 6.1 seconds, which is incredibly fast for a truck of this size.

3500HD version gains 0-60 MPH in 7.3 seconds:

4WD Silverado and GMC Sierra:

  • 2500HD gain 0-60 MPH in 6.1 seconds
  • 3500HD gain 0-60 MPH in 7.3 seconds

Warrantee of Duramax L5P Engine:

General Motors (GM) is reducing the engine warranty day by day, and it’s not sitting well with some customers. The latest Duramax L5P engine only has 5-year or 60,000-mile warranty coverage, whichever comes first.

Many drivers nowadays easily surpass this mileage limit within just a few years. It’s not uncommon for people to drive well over 100000 miles in just four or five years.

Reliability of L5P Engine:

The Duramax L5P engine manufactured by General Motors (GM) is considered the most reliable engine in the market. Its towing capacity, horsepower, torque, transmission system, and driving experience stand out among all its predecessors.

The L5P has been built with advanced technology to meet modern drivers’ demands. With a towing capacity of 35,500 pounds and 445 horsepower output at 2,800 rpm, this engine is a beast on the road.

Compared to its predecessor Duramax LML engine, the L5P stands out because it provides better performance and greater fuel efficiency. The L5P engine offers a powerful acceleration that allows easy navigation through traffic and conquering terrain.

 Not only is the L5P comfortable to drive, but it’s also built to last as compared to LLY Duramax. This engine has been known to last up to 500000 miles with proper maintenance. Even without maintenance, it can still survive up to 350000 miles without issues.

Final Thoughts:

The L5P Duramax Specs are impressive in power, efficiency, and reliability. With its advanced technology and design, this engine can easily handle heavy loads while delivering optimal fuel economy. Whether you’re looking for a workhorse for your business or a reliable companion for your adventures, the L5P Duramax Specs will not disappoint.


Is L5P better than LML?

L5P and LML are two different engines used in several trucks manufactured by General Motors. When we see the difference between L5P and LML, the L5P engine is the latest addition to GM’s Duramax diesel engine lineup, while the LML engine was introduced in 2011. The L5P puts out 445 horsepower and 910 lb-ft of torque, while the LML produces 397 horsepower and 765 lb-ft of torque

Is a cold air intake good for Duramax?

The answer is yes! Adding a cold air intake to your L5P can be one of the best upgrades. Not only will it increase power and fuel efficiency, but it will also enhance the overall driving experience. 

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