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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S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal
S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal

S&B Filters

S&B 84-1000 Mud Flaps for 2.0" inch Hitch Receivers | Universal

SKU: SAB84-1000
$349
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal
S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal

S&B Filters

S&B 84-1002 Mud Flaps for 3.0" inch Hitch Receivers | Universal

SKU: SAB84-1002
$349
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal
Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal

Kleinn Automotive Air Horns

Kleinn HK7 Pro Blaster Triple Train Horn Kit with 150PSI 100% Duty Onboard Air System | Universal

SKU: KLNHK7
$839.95
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2020-2023 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP77254-01A
$2,299.99
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 75327-01A Bed Step | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP75327-01A
$329.99
Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 29858 Pop Up Locker Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT29858
$652.99
Putco 99858 Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 99858 Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 99858 Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 99858 Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 99858 Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT99858
$319.99
Putco 79858 SSR Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 79858 SSR Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 79858 SSR Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 79858 SSR Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 79858 SSR Nylon Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT79858
$299.99
Putco 19858 Nylon Oval Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 19858 Nylon Oval Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 19858 Nylon Oval Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 19858 Nylon Oval Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 19858 Nylon Oval Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT19858
$510.99
Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 48858 Nylon Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT48858
$773.99
AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP86254-01A
$1,949.99

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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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