2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Exterior Upgrades

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Bed Liners

Bed Liners

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Bed Racks

Bed Racks

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Bull Bars

Bull Bars

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Bumpers

Bumpers

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Fender Flares

Fender Flares

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Grilles & Grille Guards

Grilles & Grille Guards

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Mud Flaps

Mud Flaps

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Roof Racks

Roof Racks

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Side Steps

Side Steps

2020-2025 GM 2500HD/3500HD 6.6L L5P Duramax Tonneau Covers

Tonneau Covers

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Lund 47021201 3.5 inch Oval Bull Bar - Polished | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47021201 3.5 inch Oval Bull Bar - Polished | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47021201 3.5 inch Oval Bull Bar - Polished | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Lund

Lund 47021201 3.5 inch Oval Bull Bar - Polished | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: LND47021201
$849.99
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Lund

Lund 86521201 Revolution Bull Bar | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: LND86521201
$949.99
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 74841-00A BedXtender HD Max | 2019-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP74841-00A
$329.99
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate
AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate

AMP Research

AMP Research 74831-01A BedXtender HD Sport Sport Bed Extender - Black | 2019-2025 GM Silverado/Sierra 2500HD/3500HD Without MultiPro Tailgate

SKU: AMP74831-01A
$329.99
BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate
BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate
BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate
BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate
BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate

BedRug

BedRug BRC20LBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed with Multi-Pro Tailgate

SKU: BEDBRC20LBMPK
$479.95
BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate
BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate
BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate
BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate
BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate

BedRug

BedRug BRC20LBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed w/o Multi-Pro Tailgate

SKU: BEDBRC20LBK
$479.95
BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate
BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate
BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate
BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate
BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate

BedRug

BedRug BRC20SBMPK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed with Multi-Pro Tailgate

SKU: BEDBRC20SBMPK
$479.95
BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate
BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate
BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate
BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate
BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate

BedRug

BedRug BRC20SBK Classic Bed Liner | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed w/o Multi-Pro Tailgate

SKU: BEDBRC20SBK
$479.95
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate
Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate

Truxedo

Truxedo 1274016 Pro X15 TS Soft Roll Up Truck Bed Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevy Silverado/GMC Sierra 2500HD/3500HD 8' Bed w/ MultiPro Tailgate

SKU: TXO1274016
$719.99
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate
Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate

Truxedo

Truxedo 1273716 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/ Multipro/Flex Tailgate

SKU: TXO1273716
$669.99
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate
Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate

Truxedo

Truxedo 1273316 Pro X15 TS Soft Roll-Up Tonneau Cover w/ T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 6.10ft Bed w/o MultiPro Tailgate

SKU: TXO1273316
$669.99
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed
Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed

Truxedo

Truxedo 1272816 Pro X15 TS Soft Roll-Up Tonneau Cover w/T-Slot Rails | 2020-2025 Chevrolet Silverado/GMC Sierra 2500HD/3500HD 8ft Bed

SKU: TXO1272816
$719.99
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal
AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal

AMP Research

AMP Research 74608-01A BedXtender HD Quick Mount Bracket Kit | Universal

SKU: AMP74608-01A
$29.99
Wehrli 100459 Lower Splash Shield Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P
Wehrli 100459 Lower Splash Shield Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P
Wehrli 100459 Lower Splash Shield Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P
Wehrli 100459 Lower Splash Shield Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Wehrli Custom Fab

Wehrli 100459 Lower Splash Shield Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

SKU: WCF100459-GB
From $290.03
Wehrli 100446 3/8 inch Bumper Spacer Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD
IN STOCK
Wehrli 100446 3/8 inch Bumper Spacer Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD

Wehrli Custom Fab

Wehrli 100446 3/8 inch Bumper Spacer Kit | 2020-2026 GM Silverado/Sierra 2500HD/3500HD

SKU: WCF100446
$142.59
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal
BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal

BedRug

BedRug BRZSPRAYON Spray-In Adhesion Kit for BedRug Liners & Mats | Universal

SKU: BEDBRZSPRAYON
$19.95
WeatherTech 38211IM ImpactLiner Bed Mat | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
WeatherTech 38211IM ImpactLiner Bed Mat | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
WeatherTech 38211IM ImpactLiner Bed Mat | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
WeatherTech 38211IM ImpactLiner Bed Mat | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

WeatherTech

WeatherTech 38211IM ImpactLiner Bed Mat | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: WEA38211IM
$322.95
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 96255-01A PowerStep Vision Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP96255-01A
$2,099.99
AMP Research 74612-01A Bracket Kit w/o Multipro Tailgate | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 74612-01A Bracket Kit w/o Multipro Tailgate | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 74612-01A Bracket Kit w/o Multipro Tailgate | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP74612-01A
$59.99
Rough Country A-G12011-GPA Defender Fender Flares (Dark Slate) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-GPA Defender Fender Flares (Dark Slate) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-GPA Defender Fender Flares (Dark Slate) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

Rough Country

Rough Country A-G12011-GPA Defender Fender Flares (Dark Slate) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

SKU: RCSA-G12011-GPA
$599.95
Rough Country A-G12011-GLT Defender Fender Flares (Dyanmic Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-GLT Defender Fender Flares (Dyanmic Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

Rough Country

Rough Country A-G12011-GLT Defender Fender Flares (Dyanmic Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

SKU: RCSA-G12011-GLT
$599.95
Rough Country A-G12011-GJI Defender Fender Flares (Dark Sky) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-GJI Defender Fender Flares (Dark Sky) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

Rough Country

Rough Country A-G12011-GJI Defender Fender Flares (Dark Sky) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

SKU: RCSA-G12011-GJI
$599.95
Rough Country A-G12011-G6M Defender Fender Flares (Titanium Rush) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-G6M Defender Fender Flares (Titanium Rush) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

Rough Country

Rough Country A-G12011-G6M Defender Fender Flares (Titanium Rush) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

SKU: RCSA-G12011-G6M
$599.95
Rough Country A-G12011-G1K Defender Fender Flares (Stone Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD
Rough Country A-G12011-G1K Defender Fender Flares (Stone Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

Rough Country

Rough Country A-G12011-G1K Defender Fender Flares (Stone Blue) | 2020-2025 GM/GMC Sierra 2500HD/3500HD

SKU: RCSA-G12011-G1K
$599.95

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If you've already added on powerful performance mods to your 2020-2025 GM 2500HD/3500HD 6.6L Duramax, it's time to take it's style and functionality to the next level with some premium exterior upgrades. At Alligator Performance, we offer a wide range of aftermarket exterior parts, including side steps, fender flares, grilles, mud flaps, and roof racks, all designed to enhance both the look and utility of your GM Sierra or Silverado 2500HD/3500HD. Whether you're looking to boost your truck's rugged aesthetic with bold fender flares or improve its practicality with a durable roof rack, we have the perfect upgrades to set your truck apart from the crowd. Combine these accessories with some Lighting Upgrades and Suspension Components to create a fully customized, adventure-ready truck that looks as tough as it performs.  GM Duramax Fitments: 2020, 2021, 2022, 2023, 2024, 2025 GM 6.6L Duramax. Submodel Fitments: WT, Custom, LT, LTZ, High Country, 1LT, 2LT, Pro, SLE, SLT, AT4, Denali. Some exceptions apply, please see individual product pages for specific fitments. 

Side Steps
Fender Flares
Mud Flaps

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