GMC Sierra 2500 HD Tonneau Cover - Undercover - Flex - Black Textured - `20-`26
GMC Sierra 2500 HD Tonneau Cover - Undercover - Flex - Black Textured - `20-`26
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GMC Sierra 2500 HD Tonneau Cover – UnderCover Flex, Black Textured (2020–2026). This hard-folding, low-profile bed cover delivers durable protection and everyday utility for your Sierra HD.
Built with FRP composite panels that are lighter and more dent resistant than aluminum, the Flex sits inside the bed rails for a tight, low stance. Open it panel-by-panel or secure it upright with prop rods for full bed access. A weather-management system with perimeter rubber seals and drain tubes helps channel water out of the bed. The clamp-on design makes installation straightforward, and the entire cover can be removed quickly with no tools. The black textured finish offers a purposeful look, and locking the tailgate helps protect cargo. Backed by a 3-year manufacturer warranty.
Features
- FRP composite hard panels, black textured finish
- Ultra-low profile inside the bed rails
- Multi-position folding with built-in prop rods
- Buckles and straps secure panels when partially open
- Rubber seals and drain tubes for weather management
- Easy clamp-on install and no-tools removal
- Full bed access when fully open
Have questions or need help verifying fitment for your bed length or options? Call us at 512-982-9393 (TX) or 562-981-6800 (CA). We serve the Austin, Texas and Los Angeles, California area with professional installation and customization services.
Buying multiple items? Contact us for potential shipping discounts. We install on premises at both locations.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Need Assistance?
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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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