2020-2025
2015-2019
2007-2014
2001-2006
Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
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Extang Endure ALX Hard Folding Tonneau Cover (20-25 Sierra 3500 HD w/ 6.90-Foot Standard Box)Find parts that fit my vehicle
Item SHG34853
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$1,449.99 each
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Product Information
Features, Description, Q&A, Specs & Installation
Features & Specs
- Tonneau Cover
- Enhanced Security
- Easy to Fold
- Weatherproof
- Aerodynamic Design
- Five-Year Warranty
- Fits 2020-2025 Sierra 3500 HD Models with 6.90-Foot Standard Box
| Brand | Extang |
| Tonneau Cover Type | Hard Folding |
| Tonneau Cover Installation | Clamp On |
| Tonneau Cover Locking | Locking with Tailgate Lock |
| Toolbox Compatibility | Not Toolbox Compatible |
Description
Secure. Bid farewell to thin tarps and welcome to unmatched security. Because the Extang Endure ALX Hard Folding Tonneau Cover is made of sturdy aluminum panels, it provides an unbreakable defense against the weather and would-be robbers. Your cargo, be it newly caught bass, weekend camping gear, or priceless tools, is safe under the steadfast protection of the Endure ALX.
Convenient. In just a few seconds, the Extang Endure ALX Hard Folding Tonneau Cover may be fully folded into four sturdy aluminum components to provide you with complete bed access. No more straining to reach hidden objects or wrangling with bulky panels. It's as easy as folding, grabbing, and moving.
Design. Put an end to the typical Extang Endure ALX Hard Folding Tonneau Cover's loud drag. The low-profile design of the Endure ALX reduces noise from the roadway and increases fuel efficiency by slicing through the air with little resistance. Feel at ease as you cruise, knowing that your cover is working just as hard as you are.
Installation. Putting this Extang Endure ALX Hard Folding Tonneau Cover on your Sierra 3500 HD is easy and requires no drilling.
Warranty. There is a 5-year warranty on this product.
Application. The xtang Endure ALX Hard Folding Tonneau Cover fits 2020-2025 Sierra 3500 HD models with 6.90-Foot Standard Box.
Fitment:
- 2020 GMC Sierra 3500
- 2021 GMC Sierra 3500
- 2022 GMC Sierra 3500
- 2023 GMC Sierra 3500
- 2024 GMC Sierra 3500
- 2025 GMC Sierra 3500
Extang 80653
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
- Mounting Hardware
- Instruction Manual
4.4
Reviews of Extang Exterior Products (101)
Reviews of Extang Exterior products have an average rating of 4.4 out of 5
Feb 25, 2025
Review shared from Extang Trifecta E-Series Tri-Fold Tonneau Cover (19-25 Sierra 1500 w/ 5.80-Foot Short & 6.50-Foot Standard Box)
2025 Elevation -
Will do the job
Not as thick as my last cover for my 2014 Sierra. Don’t know if this one will make it that long. This cover allows water to get into the bed, even after multiple attempts at getting the cover to sit flush. The cover looks great, just wish it sat better and materials were a little thicker.
Feb 19, 2025
Review shared from Extang Trifecta E-Series Tri-Fold Tonneau Cover (23-25 Colorado)
2024 LT - Larrysti
Nice fit.
Not much to fit it on bed. Instructions wasn’t to helpful. You have to be sure your square before tighting. Only four clamps two front two back.
Dec 12, 2024
Review shared from Extang Classic Platinum Snap Tonneau Cover (09-14 F-150)
2010 - kevincarr
Extang Classic Platinum Snap Tonneau Cover (09-14 F-150)love it
love it fits great works well shad no help can do it yourself snaps on are the best
Nov 11, 2024
Review shared from Extang Trifecta E-Series Tri-Fold Tonneau Cover (11-16 F-250 Super Duty)
2011 King Ranch - JWilder
Cover review
Easy Install Not as thick as the cover I bought 11 years ago but still good quality and fits the truck perfect
Jun 22, 2024
Review shared from Extang Solid Fold 2.0 Toolbox Tonneau Cover (15-20 F-150 w/ 6-1/2-Foot & 8-Foot Bed)
2019 XLT - DavidM3
9/10
Super east install, fits perfect behind my toolbox, only reason it’s not a 10/10 is shutting the tailgate is a little tight but other than that this tonneau cover is awesome. 9/10 would buy again
Jun 16, 2024
Review shared from Extang Trifecta E-Series Tri-Fold Tonneau Cover (09-18 RAM 1500)
2018 Big Horn - BH1500
just what I need
I did not want to spend a lot for a cover and this was very budget friendly. It is perfect for light use.
Dec 2, 2023
Review shared from Extang Trifecta E-Series Tri-Fold Tonneau Cover (19-25 RAM 1500 w/o MultiFunction Tailgate)
2023 Tradesman - Kennyc2680
Excellent Bed Cover
This was the perfect tri-fold soft cover. I would recommend this to anyone searching for one. Excellent quality. Fits perfectly. Easy to install and operate
Oct 25, 2023
Review shared from Extang Xceed Hard Folding Tonneau Cover (19-25 RAM 1500 w/o MultiFunction Tailgate)
2019 - Zavala
2019 ram xceed cover
It was really good, at first, but now doesn’t even function right. The cover is peeling off the latches destroyed its unusable after three years of ownership.
Oct 12, 2023
Review shared from Extang Trifecta 2.0 Tri-Fold Tonneau Cover (23-25 Colorado)
2023 Z71 - ChipsZ71
VERY NICE TONNEAU COVER
i ORDER THE EXTANG TRIFECTA 2.0 FOR MY NEW 2023 COLORADO NOT BEING TO SURE ABOUT A SOFT COVER AS I HAVE ALWAYS HAD HARD TONNEAUS SO FAR THIS HAS BEEN A VERY GOOD BED COVER IT DOES NOT LEAK, IT WAS SUPER EASY TO INSTALL AND FITS WELL ON THE BED.
Jun 19, 2023
Review shared from Extang Trifecta Toolbox 2.0 Tri-Fold Tonneau Cover (07-13 Silverado 1500 w/ 6.50-Foot Standard & 8-Foot Long Box)
2009 WT - Fossdale
Tonneau cover tool box edition
Nice cover very nice fit easy to install says it will not work with low profile tool box it does work and looks better with the slim look as long as you don't mind opening the cover first which is simple to access to box handles
Questions & Answers
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Will It Fit My Sierra 3500
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