2024 Duramax L5P First Look

Gale Banks opens up a new 2024 Duramax 6.6L engine and compares the parts side-by-side with the 2023 model. With this inside look, Gale finds upgrades to the new 2024 L5P that you won’t see on a spec sheet.

00:00 Intro
01:10 Teardown
02:31 Pistons
06:47 Head Gaskets
07:42 Piston Cooling Nozzles
08:59 Oil Cooler
10:39 High-Pressure Fuel Pump
13:39 Fuel Rails
15:13 Heads
18:16 Turbo
24:02 Dyno surprise!

The ’24 Chevy Silverado and GMC Sierra feature the newly-enhanced 6.6L Duramax L5P with 470hp / 975lb-ft, up from the previous generation’s 445/910. Improvements to the engine include a new turbo, pistons with tapered bowl, cylinder heads with improved cooling jackets, higher-flow injectors for greater fuel injection pressure, fuel rails to handle the increased pressure, improvements to the glow plugs, improved engine braking thanks to more powerful turbo vane actuator and upgraded valve springs, along with the latest generation Engine Control Module with new Global B architecture. 

In the Killing a Duramax series, Gale compared 2017-2019 oil coolers.

All of these new parts look seriously durable, but will they translate to more power? We already have a truck on the dyno. Stay tuned to see the results of the comparison of the 2024 Duramax!