2021 GMC UnderCover Parts

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Canyon Sierra 1500 Sierra 2500 HD Sierra 3500 HD

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2021 GMC Sierra 3500 HD Truck Bed Storage Box UnderCover

SC 20-23 GM 2500-3500
Black Smooth; Driver Side
2020-2023 Chevrolet Silverado/GMC Sierra HD (2500-3500) Drivers Side Black Smooth
Swing Case Storage Box
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
Features:
- Works With All Tonneau Covers
- Holds Up To 75 lbs.
- Moisture Seal Keeps Contents Dry
- Lockable Lid
- Quick Release Latch
- Swings Out For Easy Tailgate Access
SwingCase by UnderCover is the most innovative and versatile truck storage box ever made. Built to last from lightweight, high-impact ABS plastic; the tough, weatherproof, SwingCase is custom fitted for your truck. The SwingCase is affordable, too. In fact, you can purchase two SwingCases for less than the price of an old-fashioned truck bed box... and save a lot of space, too. Best of all, the SwingCase provides storage that is always within reach without sacrificing the use of your truck bed. Just simply pull the release lever and your gear swings out to you, no more reaching over or climbing into your truck bed. For work or play, go with SwingCase today.

Additional Fitment Information:

Vehicle	Bed
2021 - GMC Sierra 3500 HD	Fleetside

2 In Stock

$363.94 CAD

$436.73 CAD

Brand	UnderCover
Part #	SC105D
Condition	New
Warehouse	C

2021 GMC Sierra 2500 HD Tonneau Cover UnderCover

Triad 19-23 GM HD 6.9ft
Matte Black Panels Will Not Work With UnderCover SwingCase
20-2023 Silverado/Sierra HD 6.9 Bed
UnderCover Triad Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- Paintable: No
- WARNING CA Proposition 65 Message: Cancer And Reproductive
- Works w/Toolbox: No
- Front Opening: No
- Style: Hard Folding Cover
- Key Lockable: No
- Full Bed Access: Yes
- Rails To Install: No
- Low Profile: Yes
Features:
- Fashionable Matte Black Panels
- Easy On-Off Functionality
- Integrated Perimeter And Corner Seals
- Dual Hinge Seals
The TRIAD by UnderCover is a hard-folding truck bed cover featuring matte black panels for a sleek and innovative addition to your truck bed. Integrated perimeter seals protect your truck bed from the elements, while aluminum panels enhance the security of your truck bed and support up to 600 lbs of evenly distributed weight. The TRIAD has 2 available riding positions in the fully closed and 2/3 open position for convenience to haul and manage most any cargo. The TRIAD is fashioned with easy-to-use tailgate clamps allowing quick access to the truck bed. The TRIAD hard-folding cover comes completely assembled to provide a quick and easy installation and backed by a 3-year warranty.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 2500 HD	Fleetside	82.2

5 In Stock

$1,199.39 CAD

$1,439.27 CAD

Brand	UnderCover
Part #	TR16024
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Truck Bed Storage Box UnderCover

SC 19-23 GM 1500
Black Smooth; Driver Side Without CarbonPro Bed~Without Multi-Pro Tailgate
2019-2023 Chevrolet Silverado/GMC Sierra 1500 Drivers Side Black Smooth
Swing Case Storage Box
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
Features:
- Works With All Tonneau Covers
- Holds Up To 75 lbs.
- Moisture Seal Keeps Contents Dry
- Lockable Lid
- Quick Release Latch
- Swings Out For Easy Tailgate Access
SwingCase by UnderCover is the most innovative and versatile truck storage box ever made. Built to last from lightweight, high-impact ABS plastic; the tough, weatherproof, SwingCase is custom fitted for your truck. The SwingCase is affordable, too. In fact, you can purchase two SwingCases for less than the price of an old-fashioned truck bed box... and save a lot of space, too. Best of all, the SwingCase provides storage that is always within reach without sacrificing the use of your truck bed. Just simply pull the release lever and your gear swings out to you, no more reaching over or climbing into your truck bed. For work or play, go with SwingCase today.

Additional Fitment Information:

Vehicle	Bed
2021 - GMC Sierra 1500	Fleetside

1 In Stock

$363.94 CAD

$436.73 CAD

Brand	UnderCover
Part #	SC104D
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

Triad 2019-23 GM 6.5ft
Matte Black Panels Without CarbonPro Bed~Will Not Work With UnderCover SwingCase
19-2023 Silverado/Sierra 6.5 Bed
UnderCover Triad Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- Paintable: No
- WARNING CA Proposition 65 Message: Cancer And Reproductive
- Works w/Toolbox: No
- Front Opening: No
- Style: Hard Folding Cover
- Key Lockable: No
- Full Bed Access: Yes
- Rails To Install: No
- Low Profile: Yes
Features:
- Fashionable Matte Black Panels
- Easy On-Off Functionality
- Integrated Perimeter And Corner Seals
- Dual Hinge Seals
The TRIAD by UnderCover is a hard-folding truck bed cover featuring matte black panels for a sleek and innovative addition to your truck bed. Integrated perimeter seals protect your truck bed from the elements, while aluminum panels enhance the security of your truck bed and support up to 600 lbs of evenly distributed weight. The TRIAD has 2 available riding positions in the fully closed and 2/3 open position for convenience to haul and manage most any cargo. The TRIAD is fashioned with easy-to-use tailgate clamps allowing quick access to the truck bed. The TRIAD hard-folding cover comes completely assembled to provide a quick and easy installation and backed by a 3-year warranty.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 1500	Fleetside	79.4

6 In Stock

$1,199.39 CAD

$1,439.27 CAD

Brand	UnderCover
Part #	TR16023
Condition	New
Warehouse	C

2021 GMC Sierra 2500 HD Truck Bed Storage Box UnderCover

SC 20-23 GM 2500-3500
Black Smooth; Passenger Side
2020-2023 Chevrolet Silverado/GMC Sierra HD (2500-3500 Passengers Side Black Smooth
Swing Case Storage Box
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
Features:
- Works With All Tonneau Covers
- Holds Up To 75 lbs.
- Moisture Seal Keeps Contents Dry
- Lockable Lid
- Quick Release Latch
- Swings Out For Easy Tailgate Access
SwingCase by UnderCover is the most innovative and versatile truck storage box ever made. Built to last from lightweight, high-impact ABS plastic; the tough, weatherproof, SwingCase is custom fitted for your truck. The SwingCase is affordable, too. In fact, you can purchase two SwingCases for less than the price of an old-fashioned truck bed box... and save a lot of space, too. Best of all, the SwingCase provides storage that is always within reach without sacrificing the use of your truck bed. Just simply pull the release lever and your gear swings out to you, no more reaching over or climbing into your truck bed. For work or play, go with SwingCase today.

Additional Fitment Information:

Vehicle	Bed
2021 - GMC Sierra 2500 HD	Fleetside

3 In Stock

$363.94 CAD

$436.73 CAD

Brand	UnderCover
Part #	SC105P
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

AX 2019-23 GM 1500 6.7ft
Black Textured w/or w/o Multi-Pro Tailgate~Will not fit Carbon Pro model
2019-2023 Chevrolet Silverado/GMC Sierra 1500HD 6.7ft Short Bed (New Body Style) Std/Ext/Crew Black Textured w/or w/o MPT
Armor Flex Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
- Front Opening: No
- Style: Hard Folding Cover
- Install Time: 45 Minutes
- Rails To Install: No
- Low Profile: Yes
- Actual Color: Black
- Paintable: No
- Works w/Toolbox: No
- Key Lockable: No
- Full Bed Access: Yes
Features:
- Heavy Duty Panels
- Premium Grade LINE X Coating
- Dual Action Tailgate Seal
- Stylish Matte Black Appearance
- Low Profile Design
- Automatic Latching Panels
- Made In The USA
- 5 Year Warranty
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(R) 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 is proudly made in the USA, and comes backed by a 5-year warranty.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 1500	Fleetside	79.4

3 In Stock

$1,779.99 CAD

$2,135.99 CAD

Brand	UnderCover
Part #	AX12023
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

EL 2019-23 Sierra 1500 5.10ft
Black Textured; Without Multi-Pro Tailgate Without CarbonPro Bed~Without Multi-Pro Tailgate
2019-2023 GMC Sierra 1500 5.10ft (New Body Style) Short Bed Ext/Crew Black Textured-w/o MultiPro TG Black Textured
Elite Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
- Front Opening: Yes
- Style: Hard Non-folding Cover
- Install Time: 15 Minutes
- Rails To Install: No
- Low Profile: No
- Actual Color: Black
- Paintable: No
- Works w/Toolbox: No
- Key Lockable: Yes
- Full Bed Access: No
Features:
- New Single Lock Handle
- OEM Codable Lock
- LED Light Is 3X As Bright And Removable
- Lanyard Helps To Easily Access Cargo Just Out Of Reach
- Weather-Tight
- Lightweight
- Easy On/Easy Off Design
- Heavy Duty Steel Powder Coated Frame Rails
- Includes Garage Wall Storage System
- Sleek Styled Contour Custom Fit
The Elite By UnderCover Is The Most Refined UnderCover To Date. It Is Meticulously Designed, Engineered And Produced, But Its The Remarkable Features That Set It Apart. Completely New Design, Adding The Handle to The Back,Codable Lock And Brighter Removable LED Light.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 1500	Fleetside	69.9

Brand	UnderCover
Part #	UC1198
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

EX 19-23 Sierra 1500 5.10ft
Pull Me Over Red; Paint Code G7C/WA130X Without CarbonPro Bed~With Multi-Pro Tailgate
2019-2021/2023 GMC Sierra 1500 5.10ft Short Bed (New Body Style) Crew/Ext w/Multipro TG-G7C(WA130X)-Pull Me Over Red
Elite LX Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
- Front Opening: No
- Style: Hard Non-folding Cover
- Install Time: 15 Minutes
- Rails To Install: No
- Low Profile: No
- Actual Color: Pull Me Over Red
- Paintable: No
- Works w/Toolbox: No
- Key Lockable: Yes
- Full Bed Access: No
Features:
- Lightweight
- ABS
- Composite Construction
- Custom Engineered For A Precise Fit
- Premium Carpet Lined Underside
- Full Perimeter Seal
- Removable LED Light
- Removes Easily Using Quick Release Hardware
The Elite LX is the newest cover from UnderCover. It comes standard with all the features from the UnderCover Elite. Weve added a premium carpet lined underside, topped with flawless paint to match to make the LX the sharpest tonneau on the market. Engineered to provide a precise fit and finish to your truck bed.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 1500	Fleetside	69.9

Brand	UnderCover
Part #	UC1238L-G7C
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

EX 19-23 Sierra 1500 6.7ft
Summit White; Paint Code GAZ/WA8624 Without CarbonPro Bed~With Multi-Pro Tailgate
2019-2023 GMC Sierra 1500 6.7ft Short Bed (New Body Style) Std/Ext/Crew w/Multipro TG 50(GAZ)(WA8624)-Summit White
Elite LX Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
- Front Opening: No
- Style: Hard Non-folding Cover
- Install Time: 15 Minutes
- Rails To Install: No
- Low Profile: No
- Actual Color: Summit White
- Paintable: No
- Works w/Toolbox: No
- Key Lockable: Yes
- Full Bed Access: No
Features:
- Lightweight
- ABS
- Composite Construction
- Custom Engineered For A Precise Fit
- Premium Carpet Lined Underside
- Full Perimeter Seal
- Removable LED Light
- Removes Easily Using Quick Release Hardware
The Elite LX is the newest cover from UnderCover. It comes standard with all the features from the UnderCover Elite. Weve added a premium carpet lined underside, topped with flawless paint to match to make the LX the sharpest tonneau on the market. Engineered to provide a precise fit and finish to your truck bed.

Additional Fitment Information:

Vehicle	Bed	Bed Length
2021 - GMC Sierra 1500	Fleetside	79.4

Brand	UnderCover
Part #	UC1218L-50
Condition	New
Warehouse	C

2021 GMC Sierra 1500 Tonneau Cover UnderCover

EX 19-23 Sierra 1500 5.10ft
Abalone White; Paint Code G1W/WA140X Without CarbonPro Bed~With Multi-Pro Tailgate
2019-2023 GMC Sierra 1500 5.10ft Short Bed (New Body Style) Crew/Ext w/Multipro TG-G1W(WA140X)-Abalone White
Elite LX Tonneau Cover
Product Attributes:
- WARNING CA Proposition 65: Yes
- WARNING CA Proposition 65 Message: Warning: Cancer And Reproductive Harm - Www.p65warnings.ca.gov.
- Front Opening: No
- Style: Hard Non-folding Cover
- Install Time: 15 Minutes
- Rails To Install: No
- Low Profile: No
- Actual Color: Abalone White
- Paintable: No
- Works w/Toolbox: No
- Key Lockable: Yes
- Full Bed Access: No
Features:
- Lightweight
- ABS
- Composite Construction
- Custom Engineered For A Precise Fit
- Premium Carpet Lined Underside
- Full Perimeter Seal
- Removable LED Light
- Removes Easily Using Quick Release Hardware
The Elite LX is the newest cover from UnderCover. It comes standard with all the features from the UnderCover Elite. Weve added a premium carpet lined underside, topped with flawless paint to match to make the LX the sharpest tonneau on the market. Engineered to provide a precise fit and finish to your truck bed.