GMC Sierra 3500 HD Tonneau Cover - Extang - Endure ALX - Matte Black - `20-`26
GMC Sierra 3500 HD Tonneau Cover - Extang - Endure ALX - Matte Black - `20-`26
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GMC Sierra 3500 HD Tonneau Cover - Extang - Endure ALX - Matte Black - `20-`26. The low-profile Endure ALX folding tonneau is built for 6'9" GMC Sierra 3500 HD beds (2020–2026) without factory side storage, combining rugged durability with quick access.
The Endure ALX uses four patented EnduraShield TPO-coated panels on a lightweight aluminum frame to resist dents, scratches and UV fade while keeping weight low. Panels are ½" thick and the overall assembly supports 500 lbs of evenly distributed weight. A matte black powder coat perimeter frame and extruded weather seals help protect cargo from the elements. Extang’s Secure Rotary Latch System allows one-handed twist-and-lift operation and auto-latches for dependable security. When you need full bed access the cover folds up to the cab in seconds, and Extang backs the product with a limited 5-year warranty. Installation is straightforward and can be completed with basic tools in a short time.
Features
- Four patented EnduraShield TPO-coated panels
- ½" panels with lightweight aircraft-grade aluminum frame
- Supports 500 lbs of evenly distributed weight
- Extang Secure Rotary Latch — one-handed operation
- Matte black powder coat perimeter frame and hinges
- Extruded weatherproof seals and fold-to-cab design
- Limited 5-year warranty
If you have questions or want help confirming fitment, call us directly — we’re happy to advise. We offer installation and customization at our Austin, TX and Los Angeles, CA area locations. 512-982-9393 (TX) | 562-981-6800 (CA). If you are considering multiple items, contact us for possible shipping discounts. We install on premises at both locations.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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Call us at 512-982-9393 (Austin, TX) or
562-981-6800 (Signal Hill, CA)
and get assistance from one of our sales team members!
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