Chassis Unlimited Attitude Back Bumper Replacement CUB990571RAW 2020-2025 GMC Sierra 2500/3500 Raw

Chassis Unlimited Back Bumper Replacement for GMC Sierra 2500/3500 (2020-2025) CUB990571RAW – Heavy-Duty Rear Strength Built to Customize

If you use your Sierra the way it was meant to be used, factory sheet metal only gets you so far. This back bumper replacement from Chassis Unlimited is built for 2020–2025 GMC Sierra 2500 and 3500 trucks that need real strength, smart access, and the freedom to finish it your way. Delivered in raw steel, it’s ready for paint or powder coat once you’ve dialed in your build. Designed to hug the truck like a factory bumper—but tougher—this setup blends clean fitment with serious rear-end protection. It’s the kind of GMC truck bumper that makes sense whether you’re working, towing, or heading off the pavement.

Reinforce Your Sierra with Modular Strength of GMC Truck Bumper That Works!

• Modular 3-Piece Construction – Center and wing sections bolt together tight, creating a strong, serviceable design that’s easy to repair or customize.
• Built-In Recovery Confidence – Heavy-duty 1" thick recovery points are ready for real pulls when the situation calls for it.
• Easy Bed Access – Corner steps and a center step make climbing in and out of the bed less of a hassle.
• Clean Lighting Options – Rear-facing recessed mounts accept 3" cube lights for improved visibility when backing up or working after dark.
• Raw Finish Freedom – Ships bare so you can coat it your way—perfect for custom builds or matched finishes.

Why Pick This Chassis Unlimited Bumper For Your GMC Sierra?

This GMC Sierra rear bumper replacement is built for owners who want durability without giving up fit or function. Made from thick USA steel and engineered specifically for heavy-duty Sierra trucks, it delivers long-term strength with a clean, purpose-built look.

If you’re after Chassis Unlimited bumpers that feel solid, install clean, and leave room for customization, this back bumper replacement is ready when your truck is. Bolt it on, finish it your way, and put your Sierra to work with confidence. Shop with us now!

Custom Bumper Tips

Always do your homework before you buy a bumper! Below you can find everything you need to know about bumpers’ weight, thickness, selection, and more. To help your decision, we’ve compiled a full list of all the bumpers we carry. Compare them by look, function, and price.

Everyone wants to know about the weight of steel bumpers and we’re here to help you out. In this blog, you can find every answer to any question you could have about it.

What’s the right thickness for a bumper? Find out with our guide to bumper thickness.

We work hard to ensure that the prices of our aftermarket truck bumpers are the best available online. That’s why we guarantee that you’ll get the lowest price on all of our bumpers and accessories. Here’s how it works:

• We guarantee that the price of our aftermarket truck bumpers is the best available online. If you find an online store that offers a specific model at a lower price, let us know and we’ll match their price for your purchase.
• If you find that the exact bumper at an even lower price online within 6 months after your purchase, we will refund you the difference. Simply send a price difference refund request to support@bumperonly.com. This applies even to the prices from our own store at BumperOnly.com
• The competitor must be an online retailer with no physical stores and they must be an authorized dealer of the bumpers or accessories in question. The competing online store must also have the product in stock on their website for our price match guarantee to apply.
• The price match guarantee does not apply to online marketplaces such as Amazon, eBay, Overstock or any other similar websites. The competitor must be selling the item directly on their own online store.
• Additional promos cannot be applied in addition to the price match guarantee. For example, the free gift promo cannot be added on top of the price match guarantee. Only one promotion can be applied per purchase.

Once we confirm that your order is eligible for our price match guarantee, you can be confident that you’re getting the very best deal online.

Whether you’re looking for heavy-duty truck bumpers by Ranch Hand, a winch bumper by Fab Fours, or any other aftermarket truck bumper, if you shop with BumperOnly, you’ll never have to worry about buyer’s remorse.

For any questions about our price match guarantee, feel free to get in touch.

Shop without fear. Let BumperOnly take care of the rest.