GMC Sierra 3500 HD Folding Bed Cover - Undercover - Flex - Black Textured - `15-`19
GMC Sierra 3500 HD Folding Bed Cover - Undercover - Flex - Black Textured - `15-`19
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GMC Sierra 3500 HD Folding Bed Cover — UnderCover Flex, Black Textured, 2015–2019. A tri-fold hard cover that blends locking security with everyday convenience.
Built with FRP composite panels, the Flex sits inside the bed rails for a low profile. Prop rods hold it fully open for hauling; plastic buckles and straps secure a partially open position. Removal takes seconds with no tools. Rubber seals and drain tubes help route water away, and the clamp-on design makes installation simple. Designed for 8 ft beds on 2015–2019 Sierra 3500 HD. Backed by a 3-year warranty.
Features
- FRP composite panels: light, strong, dent resistant
- Ultra-low profile inside bed rails
- Full bed access with built-in prop rods
- Quick, tool-free removal
- Weather-resistant seals and drain tubes
- Clamp-on install; no drilling
Questions or want expert guidance? Call our Austin shop at 512-982-9393 (TX) or our Los Angeles area shop at 562-981-6800 (CA). We offer professional installation and customization at both locations.
Buying multiple items? Contact us for shipping discounts. We install on premises at Austin, TX and Los Angeles, CA.
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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562-981-6800 (Signal Hill, CA)
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