2019-2025
2014-2018
2007-2013
1999-2006
Installation Time
(approx) 15 Minutes
Difficulty Level:
Simple installation for anyone.
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Find Bed Covers & Tonneau Covers for your Sierra 1500
UnderCover Flex Tri-Fold Tonneau Cover; Black Textured (19-25 Sierra 1500 w/ 5.80-Foot Short & 6.50-Foot Standard Box)Find parts that fit my vehicle
Item S510119-B
Sierra 1500 Sales Techs:
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M-F 8:30A-11P, Sat-Sun 8:30A-9P
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55 Reviews
Our Price
$1,099.99
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Product Information
Features, Description, Reviews, Q&A, Specs & Installation
Features & Specs
- To Learn How to Measure Your Bed Click Here
- Flex Tri-Fold Tonneau Cover
- Provides Top Securement and Protection of Cargo
- Dual-Action Tailgate Seal for Tailgate Operation
- Low-Profile Design for Aesthetic Value
- Characterized by 3 Secure Riding Positions
- Heavy-Duty Aluminum Construction
- Black Textured Finish
- Easy Installation
- 3-Year Manufacturer’s Warranty
- Not Compatible with the CarbonPro Box
- Fits the 2019-2025 GMC Sierra 1500 with the Short or Standard Box
| Brand | UnderCover |
| Tonneau Cover Type | Hard Folding |
| Tonneau Cover Installation | Clamp On |
| Tonneau Cover Locking | Locking with Tailgate Lock |
| Toolbox Compatibility | Not Toolbox Compatible |
Description
Supremely Secure and Protective. The UnderCover Flex Tri-Fold Tonneau Cover - Black Textured is a hard folding truck bed cover that ensures the cargo in your GMC Sierra’s truck bed is dry and secure. Credit that to a bed rail mounting system equipped with rubber seals and train tubers that carry water away from and out of the bed. Also, it has a low-profile design for smooth integration with the truck’s overall look.
Tri-Fold Design. The tri-fold design of this tonneau cover provides you a quick and simple way to access your cargo. Depending on the size of your cargo, you will be able to travel with the cover in the closed or open position without having to take the entire cover off your Sierra. Ultimately, this cover provides 3 secure riding positions.
Heavy-Duty Construction. The Flex tonneau cover is characterized by aluminum panels so strong that you will not have to worry about wear or damage due to exposure. It is given a black textured finish to prevent fading or rusting.
Easy to Install. With its clamp-on design, this tonneau cover is easy to install. Expect to do so within 15 minutes.
Three-Year Manufacturer’s Warranty. UnderCover, Inc. warrants that this tonneau cover will be structurally free from defects in material and workmanship for 3 years from the retail date of your purchase. Some exclusions may apply; please see manufacturer’s warranty for details.
Application. The UnderCover Flex Tri-Fold Tonneau Cover - Black Textured is designed to fit the 2019-2025 GMC Sierra 1500 with a Short or Standard Box.
Technical Note. Not sure of your bed size? Click here for an instructional video explaining how to measure your bed length.
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Fitment:
- 2019 GMC Sierra 1500
- 2020 GMC Sierra 1500
- 2021 GMC Sierra 1500
- 2022 GMC Sierra 1500
- 2023 GMC Sierra 1500
- 2024 GMC Sierra 1500
- 2025 GMC Sierra 1500
UnderCover FX11022
FX11023
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) Tonneau Cover
4.5
Customer Reviews (55)
Questions & Answers
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Will It Fit My Sierra 1500
- 2.7L I4 - 19, 20, 21, 22, 23, 24, 25
- 3.0L I6 Duramax - 20, 21, 22, 23, 24, 25
- 4.3L V6 - 19, 20, 21
- 5.3L V8 - 19, 20, 21, 22, 23, 24, 25
- 6.2L V8 - 19, 20, 21, 22, 23, 24, 25
It is not Compatible on Sierra 1500 Legacy Models, fits the New Body Models Only.
