2024 Duramax: Everything we know

Watch Gale Banks crack open a new 2024 Duramax L5P 6.6-liter diesel engine and compare the parts side-by-side with a 2023 model. With this inside look, Gale finds upgrades to the 2024 Gen 2 engine that you won’t see on a spec sheet, including a new piston design, fuel rail enhancements, a new high-pressure fuel pump, and an upgraded turbo. All of these new parts look pretty durable, but will they translate to more power? Gale intends to find out.

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!

If you recall, Gale did a series called “Killing a Duramax” and he was never able to blow apart the engine. The 2024 Duramax appears to be even more bulletproof than the 2023. Gale explains how the piston design on the new engine is similar to the Banks racing pistons.

Gale explains how the pistons on the 2024 Duramax are a similar design Banks racing engine piston design.

After thoroughly explaining the pistons, we move on to the oil cooler. These trucks can tow up to 40,000 lbs, so it is imperative that your oil is cool. Gale picks apart every single part and goes over everything in great detail.

Now that you’ve seen the inside of the new engine, find out if it makes GM’s claimed horsepower in Gale’s latest video below.