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

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2020-2025 GM 2500HD/3500HD Performance Parts and Accessories

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

2020-2025 6.6L Silverado & Sierra 2500HD/3500HD

Bed Liners

Bed Racks

Bull Bars

Bumpers

Fender Flares

Grilles & Grille Guards

Mud Flaps

Roof Racks

Side Steps

Tonneau Covers

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ORDERS OVER $70

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2020-2025 6.6L Silverado & Sierra 2500HD/3500HD

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

2020-2025 6.6L Silverado & Sierra 2500HD/3500HD

Bed Liners

Bed Racks

Bull Bars

Bumpers

Fender Flares

Grilles & Grille Guards

Mud Flaps

Roof Racks

Side Steps

Tonneau Covers

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Front Runner KRCS006T Retrax 5.7ft Slimline II Load Bed Rack Kit | 2007-2025 GM Silverado/Sierra 1500/2500HD/3500HD

Front Runner KRCS008 Retrax 5.7ft Triple Load Bar Kit | 2007-2025 GM Silverado/Sierra 1500/2500HD/3500HD

Front Runner KRCS007T Retrax 6.5ft Slimline II Load Bed Rack Kit | 1988-2025 GM Silverado/Sierra 1500/2500HD/3500HD

Front Runner KRCS001T Slimline II Load Bed Rack Kit | 1987-2025 Silverado 1500/2500HD/3500HD

ACI B1020099 Lomax Hard Tri-Fold Tonneau Cover Matte Black | 2020-2024 GM Silverado/Sierra 2500HD/3500HD 6.5ft Bed

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

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

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

AMP Research 86147-01A PowerStep SmartSeries Running Boards | 2015-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research 75131-01 Light Kit | AMP Steps with New Style Controller | Universal

AMP Research 77254-01A PowerStep XL 3 inch Additional Drop | 2019-2022 GM Silverado/Sierra 2500HD/3500HD

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

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

Putco 99858 Nylon Locker Side Rails | 2019-2025 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 19858 Nylon Oval 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

Rhino Rack ROLF2 60x56 Pioneer Platform Roof Rack (Unassembled) | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Rhino Rack JA8134 Heavy Duty 2500 Silver 2-Bar Roof Rack | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Rhino Rack JA8135 Heavy Duty 2500 Black 2-Bar Roof Rack | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Rhino Rack RV0769B Black Vortex Flush Roof Rack System | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Rhino Rack JA81 Black Vortex 2500HD 2-Bar Roof Rack | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

AMP Research 86254-01A PowerStep SmartSeries Running Boards | 2019-2025 GM Silverado/Sierra 2500HD/3500HD

Bushwacker 40987-02 Pocket Style Front & Rear Fender Flares | 2021-2025 GM Silverado/Sierra 2500HD/3500HD

FREE SHIPPING ON ALL ORDERS OVER $70

PRICE MATCH GUARANTEE

BUILD NOW, PAY LATER FINANCING OPTIONS

30-DAY RETURN SATISFACTION GUARANTEE

DIESEL TRUCK EXPERTS STANDING BY

2020-2025 6.6L Silverado & Sierra 2500HD/3500HD

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FREE SHIPPING ON ALL
ORDERS OVER $70

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