UnderDog Diesel » 2021, Sierra 2500

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  • (X) Year: 2021
  • (X) Model: Sierra 2500

View Universal items for: 2021, Sierra 2500


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Items 61-120 of 284
Description: For 2020-2024 Chevy/GMC 2500/3500 6.6L Diesel with 10 speed Allison 10L1000 Transmission
Item #: 35148-B
Condition: New

Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-196437
Condition: New
Price: $99.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-196444
Condition: New
Price: $84.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-196468
Condition: New
Price: $110.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-218023
Condition: New
Price: $110.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-218030
Condition: New
Price: $110.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 24-253161
Condition: New
Price: $110.00
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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 25-218190
Condition: New
Price: $225.00

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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 25-311846
Condition: New
Price: $275.00

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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber Fits: Chevrolet Silverado 2500 HD 2023-2011, Silverado 3500 HD 2023-2011, GMC Sierra 2500 HD 2023-2011, Sierra 3500 HD 2023-2011
Item #: 25-311884
Condition: New
Price: $270.00

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Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber
Item #: 25-311891
Condition: New
Price: $270.00

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Suspension Shock Absorber Reservoir Mount
Description: Reservoir Bracket Assembly
Item #: 11-176015
Condition: New
Price: $42.00
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Description: \
Item #: 29600
Condition: New
Price: $149.00
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Description: One extra high strength dowel pin
Item #: 29601
Condition: New
Price: $2.50
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Drop-In Turbocharger
Description: Brand New Turbo. No core charge 600-650HP Rating 100% Drop In
Item #: D06-T641-002
Condition: New
Price: $2,795.00


Drop-In Turbocharger
Description: Brand New Turbo. No core charge 650-700HP Rating 100% Drop In
Item #: D06-T642-002
Condition: New
Price: $2,795.00


Limited Supply: Only 3 Left!
Price: $59.99
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Limited Supply: Only 4 Left!
Price: $20.95
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Description: Same tensile strength as ARP, at a more affordable price.
Item #: DogBone-HSK-17D
Condition: New
Limited Supply: Only 1 Left!
Price: $419.00

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Cap for L5P Intake Horn
Description: Fits L5P Intake Horn PCV Provision
Item #: DogBone-7/8-L5P-CAP-KIT
Condition: New
Price: $17.89
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L5P Coolant Cap Kit
Description: Replacement for Cheap Vacuum Plugs in 'Fix Kits'
Item #: DogBone-1/4-L5P-COOLANT-CAP-KIT
Condition: New
Price: $8.49
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Price: $3,669.38

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Price: $3,473.68

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Price: $293.55

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Description: In-vehicle ECM/TCM unlock Adds up to 125hp/275tq to the tires at Peak RPM's Monitor displays important data like Soot, Miles Since Last Regen, EGT's, Boost and Fluid Temperatures 10-speed...More Details »
Item #: 85400-261
Condition: New
Price: $979.95
Sale: $881.95
Save: 10%
Save: $98.00

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Description: Exergy 2017+ L5P Stock Replacement Injector
Item #: E02 10701
Condition: New
Price: $2,400.00

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Description: Exergy M14x1.5 Union
Item #: 1-018-129
Condition: New
Price: $63.00
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Price: $504.21
Sale: $479.00
Save: 5%
Save: $25.21

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Price: $504.21
Sale: $479.00
Save: 5%
Save: $25.21

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Air Suspension Helper Spring
Description: Kit comes with commercial grade air springs, upper and lower brackets that are industrial coated to prevent rust, DOT rated tubing, Automotive standard hardware and fittings, compressor, analog...More Details »
Item #: 2825
Condition: New
Price: $1,311.73

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Air Suspension Helper Spring
Description: 224CZ 3/4 OFF BNCTR
Item #: 6401
Condition: New
Price: $217.79

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Air Suspension Helper Spring
Description: Note: Do not exceed the vehicles GVWR. Fits: GM Silverado/Sierra 2500/3500HD (2WD/4WD)
Item #: 2860
Condition: New
Price: $1,470.61

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Firestone Ride-Rite - Firestone Ride-Rite RED Label Ride Rite Extreme Duty Air Spring Kit Suspension Leveling Kit - 2709
No Image Available
Suspension Leveling Kit
Description: RED Label Ride Rite Extreme Duty Air Spring Kit
Item #: 2709
Condition: New
Price: $987.38

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Suspension Leveling Kit
Description: Ride-Rite Air Helper Spring Kit Rear Incl. Brackets Air Helper Springs Hardware Air Line And Inflation Valves No Drilling Required
Item #: 2613
Condition: New
Price: $866.80

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Price: $21.95
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Description: 2017-2019 L5P Fuel Filter Upgrade Kit For Short and Long Bed applications as well as 2020-2024 Crew Cab Long Bed applications.
Item #: FPE-L5P-FFBA-1719
Condition: New
Price: $229.00

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Description: 2020+ L5P Fuel Filter Upgrade Kit For Short Bed Applications and 2024 Regular Cab Long Bed Applications
Item #: FPE-L5P-FFBA-20
Condition: New
Price: $229.00

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Price: $28.99
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Engine Harmonic Balancer
Description: Harmonic Balancer - Fluidampr-2020+ GM / Chevy Duramax L5P - Steel - Black Zinc Chromate - 8-3/8" dia - 30.6 lbs - SFI 18.1 - Made in USA - Each Fits: 2020+ GM/Chevy 6.6L Duramax L5P
Item #: 830151
Condition: New
Price: $685.10

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Engine Harmonic Balancer
Description: Harmonic Balancer - Fluidampr - GM L8T - L87 - L84 - 2019-2022 GM/Chevy Truck/SUVs/Vans
Item #: 760151
Condition: New
Price: $491.30

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Suspension Shock Absorber Kit
Description: Application specific valving to maximize performance.
Item #: 883-26-084
Condition: New
Price: $1,499.95

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Suspension Shock Absorber Kit
Description: Application specific valving to maximize performance.
Item #: 883-26-085
Condition: New
Price: $1,499.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-238
Condition: New
Price: $199.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-239
Condition: New
Price: $199.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-240
Condition: New
Price: $199.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-241
Condition: New
Price: $199.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-242
Condition: New
Price: $309.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-243
Condition: New
Price: $309.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-244
Condition: New
Price: $309.95

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Suspension Shock Absorber
Description: Application specific valving to maximize performance.
Item #: 985-24-245
Condition: New
Price: $309.95

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Gooseneck Trailer Hitch Ball
Description: GoosePuck 5" offset ball-puck mount for GM Long Bed 2020 to current 25K Towing (With EXT ball assembly ) Fits: GMC: Sierra 2500 HD 2020 - 2024, GMC: Sierra 3500 HD 2020 - 2024
Item #: GH-21008
Condition: New
Price: $521.97

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Gooseneck Trailer Hitch Ball
Description: GoosePuck 5" offset ball-puck mount for GM Short Bed 2020 to current 25K Towing (With EXT ball assembly) Fits: GMC: Sierra 2500 HD 2020 - 2024, GMC: Sierra 3500 HD 2020 - 2024
Item #: GH-21007
Condition: New
Price: $521.97

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Allison 1000 5SPD - 6SPD
Item #: GFP-ALLISON
Condition: New
Price: $349.00

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Current build time of 6-8 business days.
Price: $1,845.00


Transmission Control Module
Description: HP Tuners TCM - GM-T87A / 17+ Duramax
Item #: TCM-00-T87A
Condition: New
Price: $399.99

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Items 61-120 of 284

View Universal items for: 2021, Sierra 2500