Solid Folding Construction. The UnderCover Select Hard Folding Tonneau Cover features three heavy‑duty aluminum panels connected with stainless steel hinges, delivering a rigid, durable structure designed to resist sagging, bending, and rattling over time—even under heavy loads or harsh driving conditions.

Quick Access And Secure Locking. This UnderCover Select Hard Folding Tonneau Cover's tri‑fold design allows rapid access to your truck bed—fully open, partially folded, or fully closed—while the integrated tailgate latch locks into the GMC tailgate for enhanced security and prevents unauthorized opening.

Weatherproof And Resilient. Rubber weather‑seal gaskets run along the rails and tailgate, effectively keeping rain, snow, and dust out. The UnderCover Select Hard Folding Tonneau Cover's under‑rail support system reinforces the rails, preventing flexing and improving sealing, making it reliable in diverse climates.

Installation. Putting this UnderCover Select Hard Folding Tonneau Cover on your Sierra 1500 takes 30 minutes to install.

Application. The UnderCover Select Hard Folding Tonneau Cover fits 2019-2026 Sierra 1500 models with 5.80-Foot Short & 6.50-Foot Standard Box.

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