There’s an All-New Duramax 6.6L Diesel in the 2017 Silverado HD and Sierra HD!

There’s been some cool new announcements from General Motors including an off road trim level for the Sierra HD to match the other All Terrain X models.

But there’s also details on the Duramax 6.6L Diesel engine in the Sierra HD and Silverado HD!

Which do you like better, the Silverado HD or Sierra HD?


Some of the biggest news this year had to do with this killer looking hood scoop on the 2017 Chevy Silverado HD and Sierra HD.


GM teased us with just enough info to make us salivate, but now we’ve got the full details on the new off road trim levels and diesel engines.


Can GM’s new engine top the Super Duty’s numbers? Let’s find out.


Hey guys, Ken here with 4WheelOnline, and I really think you should subscribe! We’ll be at SEMA in a few weeks to show you the coolest custom Trucks and Jeeps, and you definitely don’t want to miss out on our coverage.


We’ll start with the new Sierra HD All Terrain X. This trim level joins the Canyon and Sierra 1500 as GMC’s factory off road trucks.

It’s available with the standard 2017 engines, a 6.0 L V8 gas engine that makes 360 hp and 380 lb-ft of torque. But the new Duramax 6.6L Diesel is also an option. The numbers for that? Keep watching.


The new truck is, of course, 4 wheel drive and has a host of great looking exterior details. Some of which include, 18 inch painted black wheels, a unique body-color grille with an All Terrain insert, front bumper skid plate, 4 inch black sport side steps, and a black sports bar to match the other X models. It’s also got an upgraded Z71 suspension package to round out the All Terrain part of the name.


Now that’s exciting and all that, but you’re watching this for the new Duramax engine, right? So let’s dive into that.


The new Duramax 6.6L Turbo-Diesel V8 engine, codenamed the L5P is overall a physically stronger engine. It’s also nearly 40% quieter at idle than previous models and has B20 bio-diesel compatibility.


Now, that hood scoop doesn’t look just awesome, it’s functional, too. 60% of the airflow to the engine comes from the new feature. But you’ve got to get the Diesel to have the hood scoop.


It’s ok, we’re all gonna buy the diesel anyway.


GM pairs the engine with an Allison 1000 six speed automatic transmission that’s specifically designed for the higher torque.

Oh, you want to hear the horsepower and torque numbers? Well, give us a second, first we have to talk about how the engine produces 90% of peak torque at 1,550 RPM through 2,850 RPM.


The engine is SAE-certified at 445 net horsepower at 2,800 rpm. That’s 5 more than the 2017 Super Duty’s powerstroke.


The Silverado HD and Sierra HDs make 910 lb-ft of torque at 1,600 RPM. Less than the Super Duty but only by 1.6%. So, it’s not a big deal.

So, we know you want that Duramax engine, but which do you think looks better? The Silverado HD or Sierra HD? Vote in our poll right here then leave a comment down below.


But before you do that make sure to subscribe to our channel, then thumbs up and share this video with all your friends.


Until next time, I’m Ken with 4WheelOnline and you’ve just been refreshed.

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