Undercover Undercover Armor Flex 20-26 Silv/Sierra 2500HD/3500HD 6'10" AX12024
Fits 2020-2026 6.6L Duramax V8 (L5P) · 6.6L Duramax V8 (L5P, updated)
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Price tracked 8 times since Sep 4, 2026 across the stores we check daily: low $1,249.99, high $1,399.99, currently $1,399.99.
where to buy · 2 retailers tracked
Bed covers, liners and mats keep the bed dry and stop cargo from chewing up the paint. This one is the Undercover Armor Flex 20-26 Silv/Sierra 2500HD/3500HD 6'10" AX12024, listed to fit the 2020-2026 GMC Sierra 2500HD/3500HD. The listing describes it as made in the USA.
why this one — Measure your bed length before buying. Bed covers are the most commonly returned truck part because of a wrong bed size. Rudy's Performance Parts lists it at $1399.99, and the fitment above is what the listing itself states, not a guess.
No published gain figure for this part, and nothing here is a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See how we check a price and our affiliate disclosure.