First 2024 Duramax on the Dyno

We’ve got one of the first 2024 Duramax GMC Sierra Denali 3500 HD Ultimates in the shop, and it’s on the dyno! In Gale’s latest video, he runs it on our chassis dyno to see how much of GM’s claimed 25 horsepower increase actually makes it to the wheels. Gale walks through the new truck’s beautiful interior and exterior before strapping it onto the dyno.

00:00 intro
00:25 Exterior
01:01 Interior
01:52 Engine
02:42 What we got going on
04:51 Dyno
08:28 Dyno Sheet review
11:05 Conclusion

If you’re familiar with powerful diesel trucks you know that peak horsepower isn’t the most important number. Gale explains torque rise using a dyno sheet. This is the vehicle’s lugging ability. Finally, he explains why modern diesel trucks will actually never reach their peak torque thanks to the transmission back-shifting (down-shifting). Performance parts for the 2024 Duramax L5P are now available at bankspower.com with more being released soon.

2024 Duramax L5P First Look

If you missed our first look, take a look now! 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.