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UnderCover ArmorFlex

2019 GMC Sierra 1500 New Body Style

Starting At*: $1029

2019 GMC Sierra 1500 New Body Style Select Bed Length

Need your product faster? Visit your local dealer for expert installation and superior service


The new ArmorFlex hard folding cover is designed to protect your truck bed and its contents while maintaining its strength, style, and durability. Heavy-duty panels are coated with a LINE-X® specialty automotive coating designed to provide advanced protection from dents and scuffs, even in the most extreme environments. The dual-action tailgate seal offers universal tailgate operation, allowing you to close the tailgate with the last panel of the cover-up or down. ArmorFlex comes backed by a 5-year warranty.

If you wish to learn more about the ArmorFlex visit our FAQ page





  • Heavy-Duty Panels w/ Premium-Grade LINE-X® Coating
  • Low-Profile Design w/ a Stylish Matte Black Appearance
  • Dual Action Tailgate Seal
  • Automatic Latching Panels


Please feel free to make use of the UnderCover ArmorFlex installation instructions below to assist you with the installation. Upon purchase you’ll receive vehicle specific instructions. However, if you have further questions or need technical assistance, please call one of our knowledgeable installation experts at 866-900-8800.


The UnderCover ArmorFlex carries a 5-year warranty.

Damage Resistance

The ArmorFlex truck bed cover features LINE-X® specialty automotive coating for superior protection against scuffs, dents, and dings even in the harshest of environments.

Matte Black Appearance

The LINE-X® coating provides a stylish matte black finish appearance to your truck bed cover.

Dual Action Tailgate Seal

The dual-action tailgate seal offers universal tailgate operation, allowing you to close the tailgate with the last panel of the cover-up or down.


330 Total
Ronnie W.
2020 Ram 3500
5 / 5
16 January 2021
Great procuct / Great dealer
Douglas L.
2020 Ford F-150
5 / 5
14 January 2021
Read a lot of reviews on truck covers and this one came out on top.
Jay F.
2021 Chevrolet Silverado 1500
5 / 5
9 January 2021
I've had an Undercover lid on my last three trucks. Really happy with the quality, functionality and versatility.
David B.
2021 Ram 1500
5 / 5
8 January 2021
Product as advertised, easy install. You tube videos of installation are great, the included printed instructions are not very thorough.
Abdin S.
2019 Ford Ranger
5 / 5
2 January 2021
Excellent product, great fit and looks
Allen C.
2020 Ford F-250 Super Duty
5 / 5
1 January 2021
Easy to install and fit just right/
Craig C.
2021 Toyota Tundra
5 / 5
29 December 2020
2nd Undercover owned
Serge C.
2020 Ram 2500
5 / 5
28 December 2020
Solid cover. Nice weight to it. Like the idea of the drainage tubes.
Barrett P.
2018 Chevrolet Silverado 1500
5 / 5
28 December 2020
Fantastic product that looks amazing! The aluminum skins make the cover super sleek and uniform with the pickup. Easy to install. I couldn't be happier. Great work Undercover!
Mark T.
2020 Chevrolet Silverado 2500 HD
5 / 5
23 December 2020
easy to install - works great!