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

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

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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AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal
AMP Research 19-04280-STA Replacement Controller Module | Universal

AMP Research

AMP Research 19-04280-STA Replacement Controller Module | Universal

SKU: AMP19-04280-STA
$99.99
AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD
AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD
AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD
AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD
AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD

AMP Research

AMP Research 76254-01A Powerstep Electric Running Boards Plug N Play | 2019-2022 GM Silverado/Sierra 2500HD

SKU: AMP76254-01A
$1,799.99
Cognito 110-91193 Front Fender Liner Tie Back Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Cognito 110-91193 Front Fender Liner Tie Back Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Cognito

Cognito 110-91193 Front Fender Liner Tie Back Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: COG110-91193
$99.95
Wehrli 100444 3/4 inch Bumper Spacer Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Wehrli 100444 3/4 inch Bumper Spacer Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Wehrli Custom Fab

Wehrli 100444 3/4 inch Bumper Spacer Kit | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: WCF100444
$193.03
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal
AMP Research 76404-01A OBD-II Splitter | Universal

AMP Research

AMP Research 76404-01A OBD-II Splitter | Universal

SKU: AMP76404-01A
$119.99
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

BAK Industries

BAK Industries 448133 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: BAK448133
$1,199.99
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD

Addictive Desert Designs

ADD F270012140103 Bomber Front Bumper For 20 inch Lights | 2020-2025 GM Chevrolet Silverado 2500HD/3500HD

SKU: ADDF270012140103
$2,998.98
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 76255-01A PowerStep Running Boards | 2024-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP76255-01A
$1,799.99
Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD
Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD

Ranch Hand

Ranch Hand GGC201BL1C Legend Grille Guard (Front Camera) | 2020-2023 GM Silverado/Sierra 2500HD/3500HD

SKU: RANGGC201BL1C
$912.74
S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal
S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal

S&B Filters

S&B 84-1001 Mud Flaps for 2.5 inch Hitch Receivers | Universal

SKU: SAB84-1001
$349
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal
AMP Research 75131-01A Light Kit | AMP Steps with New Style Controller | Universal

AMP Research

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

SKU: AMP75131-01A
$169.99
Husky 58286 Front and Rear Mud Guard Set | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Husky 58286 Front and Rear Mud Guard Set | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Husky 58286 Front and Rear Mud Guard Set | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Husky Liners

Husky 58286 Front and Rear Mud Guard Set | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: HUS58286
$107.99
$119.99
AMP Research 78254-01A Powerstep Extreme Running Board | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 78254-01A Powerstep Extreme Running Board | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 78254-01A Powerstep Extreme Running Board | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
AMP Research 78254-01A Powerstep Extreme Running Board | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

AMP Research

AMP Research 78254-01A Powerstep Extreme Running Board | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: AMP78254-01A
$2,199.99
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 49858 Boss Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT49858
$867.99
Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 89858 Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT89858
$589.99
Putco 88858 Black Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 88858 Black Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 88858 Black Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 88858 Black Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 88858 Black Locker Side Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT88858
$428.99
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed
Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

Putco

Putco 69858 Oval Locker Cross Rails | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.9ft Bed

SKU: PUT69858
$702.43
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed
BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed

BAK Industries

BAK Industries 448134 MX4 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8ft Bed

SKU: BAK448134
$1,249.99
$1,399.99
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed
BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed

BAK Industries

BAK Industries 772133 F1 Tonneau Cover | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 8.2ft Bed

SKU: BAK772133
$1,399.99
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD
ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD

Addictive Desert Designs

ADD F820335070103 Phantom Winch Front Bumper | 2024-2025 GM Chevrolet Silverado 2500HD/3500HD

SKU: ADDF820335070103
$2,998.98
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD
ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD

Addictive Desert Designs

ADD F271202890103 Stealth Fighter Front Bumper | 2020-2023 GM Chevrolet Silverado 2500HD/3500HD

SKU: ADDF271202890103
$2,898.98
Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD
Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

Lund

Lund 47121201 3.5 Oval Bull Bar - Black | 2020-2025 GM Silverado/Sierra 2500HD/3500HD

SKU: LND47121201
$749.99
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

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

Power Lift Shop All

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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Welcome to The Garage – your one-stop shop for all your car care and maintenance needs. From premium oils and filters to top-notch car care products, we have everything you need to keep your vehicle running smoothly and looking its best. Whether you're a DIY enthusiast or a professional mechanic, our carefully curated selection of high-quality products will help you take care of your ride like never before.

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