Chassis Unlimited Octane Rear Bumper Guard CUB910542 2011-2014 GMC Sierra 2500/3500 Texture Black Powder Coat, Sensor Cutouts

Chassis Unlimited Rear Bumper Guard for GMC Sierra 2500/3500 (2011–2014) CUB910542 – Octane Series Strength with Sensor-Ready Protection

When your Sierra’s rear end takes the brunt of the job—hooking trailers, backing into tight spots, or pulling buddies out of bad situations—this rear bumper guard is built to handle it without blinking. The Chassis Unlimited Octane Series brings together low-profile style and honest steel strength, all while keeping factory parking sensors fully functional on your 2011–2014 GMC Sierra 2500/3500. Finished in a durable textured black powder coat, it shows up ready to work the minute it hits your driveway.

Protect Your Truck with Purpose-Built Octane Series Design of GMC Truck Bumper!

• Stronger 3-Piece Construction – New design - more rigid, with an even cleaner Octane profile to your preference.
• Sensor-Compatible Fitment – Having factory parking sensors work well means you don’t have to give up convenience for ruggedness.
• Confidence in Every Recovery – Heavy-duty CNC-machined recovery points are at the ready when traction goes away.
• Easy Bed Access – The corner steps make it easier to get on the bed, particularly when it is loaded.
• Clean Lighting Options – Recessed cube light mounts and included LED license plate lights keep visibility sharp and protected.
• Bolt-On Simplicity – No cutting, welding, or grinding—just remove the factory bumper and bolt this one straight on.

Why Choose the Chassis Unlimited Bumper – Built for GMC Owners Who Use Their Trucks?

This truck back bumper guard isn’t about flash—it’s about function that lasts. Every Chassis Unlimited bumper is designed and manufactured in California with attention to strength, fitment, and everyday usability. The Octane Series delivers a balanced mix of protection, accessibility, and style without overpowering your truck’s factory lines.

If you’re looking for a GMC truck bumper that works as hard as your Sierra does, this Octane rear bumper guard is a rock-solid upgrade you can rely on mile after mile. Shop with us now!

Truck 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.