Our Favorite Mods for 2020+ Chevy & GMC HD Trucks

By Daren Foertsch

If you’re behind the wheel of a 2020 or newer Chevy or GMC HD, you already know it’s a powerhouse straight off the lot. But for us—stock is never enough! If you’re building for show, tow, or trail, the right set of aftermarket upgrades can take your truck to the next level in performance, looks, and functionality. Here are six of our favorite mods that deliver for your build.

Wheels & Tires

Upgrading your wheels and tires is often the first step in a proper build—and for good reason. The right setup transforms your truck’s presence, handling, and capability all at once. Whether you're going for show-truck stance or functional off-road traction, a quality wheel and tire combo sets the tone for everything that follows.

A great example is the American Force Vibrant wheels paired with Venom tires. This forged setup delivers the perfect balance of strength, style, and performance. The tires offer aggressive all-terrain grip; while the wheels, which are machined from billet aluminum add serious visual impact. Best of all they arrive pre-mounted and balanced with TPMS sensors for a hassle-free install! Whatever your taste, upgrading your wheels and tires is the most noticeable way to start your truck’s transformation.

Wheel Spacers

Maybe you’ve already upgraded to a new set of wheels and tires and want to dial in that aggressive stance. Or you're sticking with your factory wheels but want to push them out for better fitment and clearance. Either way, wheel spacers are one of the easiest and most affordable ways to fine-tune your truck’s footprint without committing to a full suspension change or wheel swap.

We like to run the Shifted Industries 8-lug billet spacers because they check all the boxes: strength, precision, and reliability. Made from high-grade billet aluminum, they’re engineered specifically for HD GM trucks and designed to be hub-centric, meaning they maintain OEM ride quality while improving wheel positioning. The fit is precise, the construction is tough, and the look is clean—making them the go-to choice when you want better stance, brake clearance, or that perfect flush fit.

Custom Headlights

Lighting is one of the first things people notice on a build—nothing stands out like a set of custom headlights built just for your truck. We start with your OEM headlights, disassemble them in-house, and tailor every detail to your specs. Want the internals paint-matched to your truck’s body color? Done. Want something bold like blacked-out housings or a pop of contrast with red or gunmetal? We’ve got you covered.

You can choose clear, tinted, or color-matched reflectors, and we offer advanced lighting mods too—like switchback or RGB DRLs, and custom projectors. Whether you're going for clean OEM+ vibes or a full-on show setup, your headlights will be built to turn heads day or night.

Customers send in their stock headlights, and we handle the rest—professionally modding and returning them, fully tested and sealed. We’ve been doing this for over 10 years, and custom lighting is just the start. If it bolts to a truck, we can probably customize it. From grilles to emblems to mirror caps—we do it all, and we do it right.

Differential Cover

Built to keep your rear end cool under pressure, the Mag-Hytec differential cover is a smart upgrade for anyone who tows, hauls, or looking to increase durability. The extra fluid capacity and finned design help regulate gear oil temps, while the magnetic dipstick and drain plug make maintenance quick and clean. It’s compatible with 2020–2025 GM HD trucks and also fits select Ram 2500 models running the AAM 14-bolt axle.

And for those wanting a truly dialed-in look, we offer custom powder coating options to match your build. Whether you want to go stealth with satin black or match your accent color with something bold like red, silver, or a custom metallic, we can finish the cover to fit your style. It’s a subtle touch that makes a big statement—especially if you're rocking a lifted setup where everything underneath is on full display.

Leveling Kit

Leveling your truck is one of the most impactful upgrades you can make—and when you're using the Cognito 3-inch leveling kit paired with FOX shocks, you're not just lifting your front end, you're upgrading the entire ride experience. This kit balances out the factory rake and unlocks additional clearance for larger wheels and tires, while the remote reservoir FOX shocks keep things smooth on or off the pavement.

We also offer custom powder coating for the Cognito components to match your build’s color scheme—perfect for anyone looking to keep their undercarriage as clean and cohesive as the exterior. Want to really dial it in? Add the optional Bucket Top Reservoir Mount to give your remote reservoirs a secure, professional install and clean aesthetic. It’s a premium detail that elevates both form and function under the hood.

Power Running Boards

These powered running boards from Boost Auto are all about form meets function. When you open the door, they automatically deploy to provide a sturdy step—then tuck away seamlessly once the doors are shut. Perfect for lifted trucks or anyone wanting a cleaner side profile without sacrificing accessibility.

What makes ours different? For starters, we offer a plug-and-play adapter, making installation much simpler—no complex wiring or splicing required. We also provide custom powder coating options to match your build’s color scheme, whether you're going subtle or bold. Lighting-wise, the options are wide open—white, amber, RGB, or switchback lighting can all be integrated into the steps, giving your truck extra visibility and serious style. If you're aiming for a refined look with added utility, these boards are a no-brainer.

Upgrading your Chevy or GMC HD isn’t just about looks—it’s about building something that fits your style and performs the way you need it to. Whether you're dialing in your stance, adding custom touches, or upgrading performance parts, Legends Auto Parts has you covered with the parts, the know-how, and the ability to customize nearly every piece of your build!

Need install help or want to go even further? The LAB, our in-house shop, can handle everything from powder coating and lighting mods to full suspension and drivetrain upgrades. If you can dream it, we can build it!