GMC Sierra 3500HD Tonneau Cover - Undercover - Flex Folding - Black Textured - `15-`19
GMC Sierra 3500HD Tonneau Cover - Undercover - Flex Folding - Black Textured - `15-`19
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GMC Sierra 3500HD Tonneau Cover - UnderCover Flex Folding, Black Textured (2015–2019). A durable hard-folding cover that delivers secure protection and quick bed access for your heavy-duty Sierra.
Built with FRP composite panels in a black textured finish, the Flex sits low inside the bed rails for a clean profile and dependable weather resistance. Rubber seals and drain tubes help channel water away, while built-in prop rods let you drive with the cover secured fully open when you need maximum cargo room. Plastic buckles and straps hold panels in partial positions, and the clamp-on, no-drill design makes installation straightforward. Entire cover removes without tools. Fits 2015–2019 Sierra 2500/3500HD with 6'6" bed; please confirm bed length and model-year compatibility before ordering.
Features
- FRP composite panels: light, strong, dent-resistant
- Ultra-low profile inside the bed rails
- Built-in prop rods for full-bed access while driving
- Plastic buckles and straps for partial-open positions
- Rubber seals and drain tubes channel water away
- Clamp-on, no-drill install; tool-free removal
- 3-year manufacturer warranty
Have questions or want expert guidance? Call our team in Austin, TX at 512-982-9393 or the Los Angeles, CA area at 562-981-6800. We offer installation and customization services at both locations.
Thinking about purchasing multiple items? Contact us for 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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