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  • Hard Folding Tonneau Cover for Silverado Sierra HD – Armor Flex 20–25 6ft 10in Matte Black Aluminum
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Hard Folding Tonneau Cover for Silverado Sierra HD – Armor Flex 20–25 6ft 10in Matte Black Aluminum

Undercover
UNDAX12024
In stock
Bed Covers - Folding
$1,361.50 $1,299.99
Protect your truck bed with a hard folding tonneau cover for Silverado Sierra HD that’s built...
$1,299.99
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Hard Folding Tonneau Cover for Silverado Sierra HD – Armor Flex 20–25 6ft 10in Matte Black Aluminum
Description

Protect your truck bed with a hard folding tonneau cover for Silverado Sierra HD that’s built for heavy-duty performance. The Armor Flex 20–25 6ft 10in cover is engineered for 2020–2025 Chevrolet Silverado and GMC Sierra 2500HD/3500HD models, offering a precise fit and rugged protection.

Crafted from durable aluminum, this hard folding tonneau cover features a low-profile design and a matte black finish that adds a bold, refined look to your truck. With full bed access and a fold-up operation, it’s ideal for hauling tools, equipment, or weekend gear. The flush fit enhances aerodynamics while keeping your cargo secure from the elements.

Installation is straightforward and requires no drilling, taking approximately 45 minutes. It’s not lockable, but it’s built to withstand tough conditions and keep your gear protected. Whether you're working on the job site or heading off-road, this cover delivers the durability and style your HD truck deserves.


Features and Benefits

Hard Folding Aluminum Design – Built tough to withstand harsh conditions and daily use Full Bed Access – Fold-up panels allow complete access when needed Low Profile Style – Sits flush for a sleek, aerodynamic appearance Matte Black Finish – Resists scratches and adds rugged appeal Quick Install – No drilling required; installs in about 45 minutes Specific Fit for 2020–2025 Silverado/Sierra HD – Designed for 6ft 10in beds on 2500HD and 3500HD models


Built for Real-World Demands

From hauling heavy loads in Houston to weekend trails in Montana, this hard folding tonneau cover for Silverado Sierra HD is built to handle whatever life throws at it. It’s the kind of upgrade that works hard, looks sharp, and keeps your cargo secure.


Specifications

Feature Detail
Part Number undAX12024
Fitment 2020–2025 Silverado/Sierra 2500HD/3500HD
Bed Length 6ft 10in
Material Aluminum
Finish Matte Black
Install Time 45 Minutes
Drilling Required No
Full Bed Access Yes
Front Opening No
Lockable No
Toolbox Compatible No
Mounting Hardware Included
Operation Fold-Up
Paintable No
Prop 65 Warning Yes – Cancer and Reproductive Harm


Installation Instructions
Installation Instructions


This Part Fits:

 

Year Make Model Submodel
2020-2025 Chevrolet Silverado 2500 HD Custom
2020-2025 Chevrolet Silverado 2500 HD High Country
2020-2025 Chevrolet Silverado 2500 HD LT
2020-2025 Chevrolet Silverado 2500 HD LTZ
2020-2025 Chevrolet Silverado 2500 HD WT
2024-2025 Chevrolet Silverado 2500 HD ZR2
2020-2025 Chevrolet Silverado 3500 HD High Country
2020-2025 Chevrolet Silverado 3500 HD LT
2020-2025 Chevrolet Silverado 3500 HD LTZ
2020-2025 Chevrolet Silverado 3500 HD WT
2020-2025 GMC Sierra 2500 HD AT4
2024-2025 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 2500 HD Base
2020-2025 GMC Sierra 2500 HD Denali
2024-2025 GMC Sierra 2500 HD Denali Ultimate
2022-2025 GMC Sierra 2500 HD Pro
2020-2025 GMC Sierra 2500 HD SLE
2020-2025 GMC Sierra 2500 HD SLT
2020-2025 GMC Sierra 3500 HD AT4
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD Denali
2024-2025 GMC Sierra 3500 HD Denali Ultimate
2022-2025 GMC Sierra 3500 HD Pro
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT

REVIEWS

JW

This Armor Flex cover is exactly what my Silverado HD needed. It looks clean, installs fast, and gives me full access to the bed. No rattles, no leaks—just solid performance.

James W.

Billings, MT

★★★★★
KH

I’ve had this on my Sierra 3500 for months and it’s held up through rain, snow, and heat. Super easy to use and the matte black finish still looks brand new.

Karen H.

Spokane, WA

★★★★★
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Effective Date: October 2024
We offer a 30-day return policy, allowing you to request a return within 30 days of receiving your item. To qualify for a return, the item must be in its original condition—unused, with tags, and in its original packaging. A receipt or proof of purchase is also required.

To initiate a return, please contact us at info@riotparts.com. Returns must be shipped to the address provided upon request. If your return is approved, we will issue a return shipping label along with detailed instructions.

Important
Returns sent without prior authorization will not be accepted.

For any return-related inquiries, please reach out to us at info@riotparts.com.

Return Shipping Address
The return shipping address will be determined based on the requestor’s location to ensure the nearest return facility is used.

Possible return locations include:
• 10880 Lear Blvd.
Reno, NV 89506, United States
• 931 W. Bardin Rd., Suite 150–200
Arlington, TX 76017, United States
• 3035 Campus Dr.
Hatfield, PA 19440, United States
• 5789 N. Graham Road, Ste 200
Whiteland, IN 46184, United States
• 2020 NE Aloclek Dr 4711 N Lamon Ave
#118 STE 12, Hillsboro, OR 97124, United States

Damages and Issues
We recommend inspecting your order upon receipt. If you find that an item is defective, damaged, or if you received the wrong item, please contact us immediately so we can address the issue.

Exceptions / Non-Returnable Items
Certain items cannot be returned, including:
• Electrical parts that have been installed or used
• Special order parts that were custom ordered for you
• Items that have been damaged due to improper installation or use

If you have questions or concerns about a specific item, please contact us for assistance.

Exchanges
For exchanges, the quickest option is to return the item you have. Once the return is accepted, you can make a separate purchase for the new item.

Refunds
We will notify you once we receive and inspect your return to inform you whether your refund is approved. If approved, you will be automatically refunded using your original payment method within 10 business days. Please be aware that it may take additional time for your bank or credit card company to process and post the refund.

If more than 15 business days have passed since your return was approved and you haven’t received your refund, please contact us at info@riotparts.com.

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