Chassis Unlimited Octane Heavy Duty Rear Bumper CUB910572RAW 2020-2025 GMC Sierra 2500/3500 Raw, Sensor Cutouts

Chassis Unlimited Heavy-Duty Rear Bumper for GMC Sierra 2500/3500 (2020–2025) CUB910572RAW – Raw Strength Built for Real Work

When your Sierra earns its keep hauling, towing, and backing into tight spots, a heavy-duty rear bumper isn’t just an upgrade, it’s peace of mind. This Octane Series bumper from Chassis Unlimited is built for folks who want raw strength, factory-level fitment, and the freedom to finish it their way. Designed specifically for the 2020–2025 GMC Sierra 2500/3500, this bumper comes raw and ready, making it a solid choice for custom powder coat, paint, or bedliner finishes. It keeps your factory parking sensors and blind-spot monitoring working just like stock, so you don’t lose functionality for the sake of strength.

Upgrade Your Sierra with Octane Bumper Capability!

• 3-Piece Modular Construction – Stronger than one-piece constructions but still tight and rattle-free on the truck.
• Sensor-Friendly Construction – Parking sensors and blind spot monitoring systems remain operational for worry-free backing up and towing.
• Integrated Corner Steps – Helps with entering and exiting the truck bed after a long day of work.
• Recovery-Ready Confidence – Heavy-duty CNC-machined recovery points provide real pulling power when the going gets tough.
• Backup Light Ready – Recessed mounts let you add cube lights for better visibility in dark yards or job sites.
• Raw Finish Freedom – Leave it raw, paint it, or coat it, this bumper is built for builders who want options.

Why Trust the Chassis Unlimited Heavy-Duty Rear Truck Bumper – Octane Bumpers Built to Work?

This heavy-duty rear truck bumper is made for drivers who expect their gear to last. As part of the Octane lineup, it delivers real-world toughness without cutting corners on fit or function.

If you’re after a truck rear bumper guard that bolts on clean, handles abuse, and gives you the freedom to customize, this one’s ready when you are. Bolt it up, finish it your way, and put your Sierra back 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.