Shop parts and accessories that fit the 2021 GMC Sierra 3500 HD: tonneau covers, lighting, steps and running boards, suspension, exhaust, bumpers and more from the brands truck owners trust. Every part on this page is matched to the 2021 GMC Sierra 3500 HD using manufacturer fitment data. Use the vehicle selector above to narrow results by trim, cab, bed length and engine.


ANZO USA
ANZO USA 311459 LED Tail Light Assembly Set for 2020-2023 GMC Sierra 2500HD/3500HD, 2019-2023 GMC Sierra 1500
Price$428.99Free Shipping
In Stock
★ Mission Ready

Skyjacker
Skyjacker ADX M2.0 Adventure Series Aluminum Monotube Shock M2017 for Chevy Silverado/Suburban, GMC Sierra, Ram 1500/2500/3500 & More
Price$176.26
In Stock
★ Mission Ready

Skyjacker
Skyjacker ADX M2.0 Adventure Series Aluminum Monotube Shock M2036 for Chevy Silverado/Suburban, GMC Sierra, Ram 1500/2500/3500 & More
Price$176.26
In Stock
★ Mission Ready


TrailFX
TrailFX G22LL3 2-Inch Suspension Leveling Kit for 2020-2024 Chevrolet Silverado and GMC Sierra 2500 HD/3500 HD
Price$125.99
In Stock
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TrailFX
TrailFX BUG04 2-Inch Rear Lift Leaf Spring Block Kit for Chevrolet Silverado and GMC Sierra 3500 HD
Price$111.99
In Stock
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Fabtech
Fabtech K1155M Uniball Upper Control Arm Lift System with Dirt Logic Shocks for 2020-2022 Chevy Silverado and GMC Sierra HD
Price$1,495.59Free Shipping
In Stock
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Fabtech
Fabtech K1157M 3.5-Inch Ball Joint Control Arm Lift System for GM 2500HD, Fits Chevy Silverado 2500HD, GMC Sierra 2500HD/3500HD
Price$1,176.68Free Shipping
In Stock
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Skyjacker
Skyjacker M9569 M95 Monotube Shock for 2012-2014 Chevrolet Silverado and GMC Sierra HD
Price$99.82
In Stock
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Fabtech
Fabtech K1179M Ball Joint UCA Lift System with Dirt Logic 2.25 Shocks for 2020-2021 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD
Price$1,349.31Free Shipping
In Stock
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Fabtech
Fabtech K1202DL 4-Inch Performance Lift System with Shocks for Chevy Silverado 3500 HD and GMC Sierra 3500 HD
Price$3,678.58
In Stock
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Fabtech
Fabtech 4-Inch Performance Lift System with Shocks K1203DL for 2020–2023 Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD
Price$3,898.12
In Stock
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Zone Offroad
Zone Offroad Nitro Smooth Body Shock Absorber ZON7603 for 2011-2024 Chevy Silverado 2500HD/3500HD, 2011-2024 GMC Sierra 2500HD/3500HD
Price$67.99
In Stock
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Zone Offroad
Zone Offroad Nitro Smooth Body Shock Absorber ZON7757 for Chevy Colorado/Silverado, GMC Canyon/Sierra, Ram 1500, Dodge Ram
Price$54.95
In Stock
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Zone Offroad
Zone Offroad ZONC1231 2-Inch Torsion Key Leveling Kit for Chevy Silverado and GMC Sierra HD
Price$122.95
In Stock
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Bilstein
Bilstein B6 4600 Shock Absorber 24-196437 for Stock-Height Light Trucks and SUVs, Fits Chevy Silverado 2500HD/3500HD, GMC Sierra 2500HD/3500HD
Price$109.00
In Stock
★ Mission Ready

Bilstein
Bilstein B6 4600 24-196444 Monotube Suspension Shock Absorber for 2011-2026 Chevy Silverado 2500HD/3500HD, 2011-2026 GMC Sierra 2500HD/3500HD
Price$92.00
In Stock
★ Mission Ready


Bilstein
Bilstein B8 5100 Monotube Suspension Shock Absorber 24-196468 for 2011-2026 Chevy Silverado 2500HD/3500HD, 2011-2026 GMC Sierra 2500HD/3500HD
Price$123.00
In Stock
★ Mission Ready


Bilstein
Bilstein B8 5100 24-218023 Monotube Suspension Shock Absorber for 2011-2026 Chevy Silverado 2500HD/3500HD, 2011-2026 GMC Sierra 2500HD/3500HD
Price$123.00
In Stock
★ Mission Ready


Carr
Carr 103331 HOOP II Assist Side Steps, XP3 Black Powder Coat, Pair for Chevy Colorado/Silverado, GMC Canyon/Sierra
Price$181.73
In Stock
★ Mission Ready









