Chassis Unlimited Octane Aftermarket Rear Bumper CUB910301RAW 2015-2019 GMC Sierra 2500/3500 Raw

Chassis Unlimited Octane Aftermarket Rear Bumper for GMC Sierra 2500/3500 (2015–2019) CUB910301RAW – Heavy-Duty Steel Protection

When your 2015–2019 GMC Sierra 2500 or 3500 is built to tow heavy and work hard, a factory bumper just won’t cut it. The aftermarket rear bumper from Chassis Unlimited’s Octane Series delivers rugged strength, modern low-profile styling, and the kind of durability heavy-duty trucks demand. This isn’t just another GMC aftermarket bumper — it’s engineered from 3/16” USA steel and designed with a reinforced 3-piece construction that improves strength while maintaining a clean, aggressive profile.

Upgrade to a Chassis Unlimited Octane Bumper That Works as Hard as Your Truck!

• Strengthen Your Rear-End Protection – The enhanced 3-piece design increases structural integrity, giving you one of the toughest heavy-duty rear truck bumpers available for your Sierra.
• Recover with Confidence – Equipped with CNC machined 1-inch thick recovery points with a 1-inch bore, built to handle serious pull situations when it matters most.
• Improve Jobsite & Trailer Access – Integrated corner steps on both sides plus a center step make climbing in and out of the bed easier — especially when you’re hooking up or unloading gear.
• Light Up the Work Area – Recessed rear-facing mounts accommodate 3-inch LED cube lights for added visibility when backing up (lights sold separately), and LED license plate lights are included.

Why Choose This GMC Aftermarket Bumper – Heavy-Duty GMC Sierra Protection?

The Chassis Unlimited Octane bumper is built for truck owners who demand more from their GMC aftermarket bumper. With thick 3/16” steel construction, integrated recovery points, functional step access, and lighting provisions, this aftermarket rear bumper blends aggressive styling with real-world utility.

Whether your Sierra lives on the jobsite, pulls heavy trailers, or spends weekends off the pavement, this heavy-duty rear truck bumper is ready to handle it. Upgrade your rear-end protection with American-made strength and bolt-on confidence — your GMC deserves nothing less. Shop with us now!

Offroad 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.