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Underneath a 2017 GMC Sierra Denali — How Well Is It Built?

3,589 views · Published 25 March 2016 · 2:22 · Indexed 6 November 2026

Channel: Mike Martins · 2016 · Autos & Vehicles

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Let's get underneath a **2017 GMC Sierra Denali** and see how this truck is actually put together.

Instead of only looking at the leather seats, dashboard, chrome and luxury features, I wanted to get down underneath the truck and take a look at the mechanical layout.

I'm checking out the front suspension, CV boots and axles, protective panels, exhaust routing, transmission area, transfer case, driveshaft, fuel tank, rear suspension and factory exhaust system.

One of the things that immediately stands out to me is how substantial everything looks underneath.

Up front, I'm looking at the independent suspension arrangement, CV components and the protective covering underneath the engine area. Moving toward the centre of the truck, you can see how the exhaust is routed around the drivetrain along with the transmission and four-wheel-drive components.

Further back, we get a good look at the driveshaft, fuel tank and rear suspension.

The Sierra is still using a traditional leaf-spring arrangement in the rear, which makes sense for a truck designed to carry and tow loads. You can also see the spare tire mounted underneath the bed and the factory exhaust running toward the rear.

I'm also impressed with the amount of underbody protection and coating I'm seeing on this particular truck.

This isn't meant to be a complete technical teardown. I'm simply crawling underneath a new 2017 Denali at the time and giving everyone a close look at components that you normally don't get to see in dealership photographs.

If you're considering a GMC Sierra Denali and you're interested in what's underneath all the luxury equipment, here's a different perspective.

From what I'm seeing during this inspection, the chassis, suspension and drivetrain installation look substantial.

Thanks for watching the Mike Martins Channel!

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