GMC Sierra 3500 2020–2026 Parts & Accessories

28 parts listed as fitting the 2020–2026 GMC Sierra 3500. The selection leans heavily to truck bed and tonneau — 21 of the 28 parts — with the rest spread across 3 other categories. The brands carrying the most parts for this vehicle are Retrax, BAK Industries and BackRack. This page covers the 2020–2026 years only — other years of the GMC Sierra 3500 are on the model page. Fitment is listed by year, make and model — confirm your exact configuration before ordering.

Browse every part that fits
Tonneau Cover Hard Folding G2 (20-26 GMC/Chevrolet Sierra/Silverado 2500/3500 Heavy Duty Short Box)BAK Industries BAK Industries Tonneau Cover Hard Folding G2 — 6'9" Bed — 2020-2026 Chevy Silverado 2500/3500 & 2020-2026 GMC Sierra 2500/3500 (226133) $1,609.99 Go Rhino 2019+ Silverado Silverado 1500/2500/3500Hd Rb10 Running Boards with Mounting BracketGo Rhino Go Rhino 2019+ Silverado 1500/2500/3500Hd Rb10 Running Boards with Mounting Bracket (6340488720PC) $1,341.99 Putco 2020+ Silverado Hd/Sierra Hd 6.8Ft (Standard Box)Molle Driver Side Bed PanelPutco Putco 2020+ Silverado HD/Sierra HD 6.8 ft (Standard Box)Molle Driver Side Bed Panel $668.99 Auto Ventshade (Ph 11/10) 2019+ Silv/Sierra 1500/2020+ Silverado/Sierra 2500/3500 Crew Cab Ventvisor Inchannel 4PcAVS AVS Window Deflectors (Ph 11/10) $118.53 UnderCover 20 Gm 2500/3500 Hd 8Ft Bed Undercover Armor Flex Without Carbonpro BedUnderCover UnderCover 20 GM 2500/3500 HD 8 ft Bed Undercover Armor Flex Without Carbonpro Bed $2,029.99 Putco 2020+ Silverado/Sierra 2500/3500 6.8Ft Standard Bed Locker Side RailPutco Putco 2020+ Silverado/Sierra 2500/3500 6.8 ft Standard Bed Locker Side Rail $672.99 BAK Industries 2020+ Silverado/Sierra 2500/3500 Hd (without Velcro/Stitching) Revolver X2 6Ft 9In BedBAK Industries BAK Industries 2020+ Silverado/Sierra 2500/3500 HD (without Velcro/Stitching) Revolver X2 6 ft 9" Bed $1,931.99 Go Rhino 2019+ Silverado 1500 Crew Cab Rb10 Steel Running Boards with Bedliner Material CoatingGo Rhino Go Rhino 2019+ Silverado 1500 Crew Cab Rb10 Steel Running Boards with Bedliner Material Coating (63404887T) $1,134.99 Go Rhino 2019+ Ram 1500 Fits All Cab Styles Sport Bar 2.0 Polished Stainless Sport Bar BedGo Rhino Go Rhino 2019+ Ram 1500 Fits All Cab Styles Sport Bar 2.0 Polished Stainless Sport Bar Bed (918600PS) $2,456.99 Backrack 2019+ Silverado/Sierra 1500 New Bod Style Toolbox No Drill 31In Hardware Kit FraBackRack BackRack 2019+ Silverado/Sierra 1500 New Bod Style Toolbox No Drill 31In Hardware Kit Fra (30122TB31) $196.17 N-Fab 20-21 GM Silverado/Sierra 2500 & 3500 Cab Length Podium LG Step System (HPC1971QCTX)N-Fab N-Fab Inc 2019-2021 Silverado/Sierrra 1500/2020+ Silverado/Sierra 2500/3500 Cab Length Podium Lg Steps $814.99 Backrack 2020+ Silverado/Sierra 2500/3500 Hd Low Profile Tonneau Hardware KitBackRack BackRack 2020+ Silverado/Sierra 2500/3500 Hd Low Profile Tonneau Hardware Kit (40124) $279.99 Backrack 2020+ Silverado/Sierra 2500/3500 Hd Wide Top Tonneau Hardware KitBackRack BackRack 2020+ Silverado/Sierra 2500/3500 Hd Wide Top Tonneau Hardware Kit (50124) — 2020-2026 GMC Sierra 3500 $279.99 UnderCover 2020+ Silverado/Sierra 2500/3500 Undercover Swing Case Passengers Side Black SmoothUnderCover UnderCover 2020-2026 Silverado/Sierra 2500/3500 Undercover Swing Case Passengers Side Black Smooth (SC105P) $332.75 BAK Industries 2020+ Silverado/Sierra 2500/3500 Hd Bakflip F1 6Ft 9In BedBAK Industries BAK Industries 2020+ Silverado/Sierra 2500/3500 Hd Bakflip F1 6Ft 9In Bed (772133) $1,959.99 BAK Industries 2020+ Silverado/Sierra 2500/3500Hd 8.2Ft Bed Revolver Tonneau X4S with Tslot RailsBAK Industries BAK Industries 2020+ Silverado/Sierra 2500/3500Hd 8.2Ft Bed Revolver Tonneau X4S with Tslot Rails (80134RK) $2,379.99 Backrack 1995-2007 Tundra Backrack Frame Only (Hdw Kit Req)BackRack BackRack Headache Rack — 1995-2007 Toyota Tundra (Hdw Kit Req) $335.99 Extang 2020+ Silverado/Sierra 2500/3500 6Ft 9In (Excl Factory Side Storage Boxes)Eseries TonnoExtang Extang Trifecta e-Series Soft Folding Tonneau Cover — 2020+ GMC Sierra 3500 (Excl Factory Side Storage Boxes) $475.99 Extang 2020+ Silverado/Sierra 2500/3500 8Ft (without Factory Side Boxes) Trifecta 2.0Extang Extang 2020+ Silverado/Sierra 2500/3500 8Ft (without Factory Side Boxes) Trifecta 2.0 $727.99 Retrax 2020+ Silverado/Sierra 2500/3500 Hd (without Factory Side Storage Bx) 6.9Ft Retraxone Mx Tonneau CoverRetrax Retrax 2020+ Silverado/Sierra 2500/3500 Hd (without Factory Side Storage Bx) 6.9Ft Retraxone Mx Tonneau Cover $2,375.99 Retrax 2020+ Silverado/Sierra 2500/3500Hd 6.9Ft Frc4000 Pro Ez Off Retract Cover with Removable CanisterRetrax Retrax 2020+ Silverado/Sierra 2500/3500Hd 6.9Ft Frc4000 Pro Ez Off Retract Cover with Removable Canister (R-T-80484) $3,832.10 Retrax 2020+ Silverado/Sierra 2500/3500 6.9Ft Xr Tonneau Cover Without Carbonpro BedRetrax Retrax 2020+ Silverado/Sierra 2500/3500 6.9Ft Xr Tonneau Cover Without Carbonpro Bed — 6'9" Bed — 2020-2026 Chevy Silverado 2500/3500 & 2020-2026 GMC Sierra 2500/3500 (T-60484) $2,591.99 Retrax 2020+ Silverado/Sierra 2500/3500 6.9Ft Retrax Pro Xr Tonnea Cover Without Carbonpro BedRetrax Retrax Retractable Tonneau Cover — 2020+ GMC Sierra 3500 $3,446.99 Retrax 2020+ Silv/Sierra 2500/3500 8Ft Bed Retraxpro Xr (Excl Factory Side Storage Boxes/without Carbonpro Bed)Retrax Retrax Storage Box (Excl Factory Side Storage Boxes/without Carbonpro Bed) $3,590.99
Check fitment before you order. Fit can depend on trim, configuration and factory options. If you are unsure, contact us — and if fitment we published turns out to be wrong, we cover the return.