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UnderDog Diesel » 2021, GMC, Sierra 2500
Products for:
- Year: 2021
- Make: GMC
- Model: Sierra 2500
View Universal items for: 2021 GMC Sierra 2500
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Gooseneck Trailer Hitch Mount Kit
Description: Custom mounting bracket kit for Chevrolet & GMC trucks. No-drill, bolt-on application. To be used in conjunction with a Center Assembly kit.
Item #: GNRM1020
Condition:
New
Price: $384.00
Truck Cab Protector / Headache Rack
Description: B&W Custom Headache Rack w/ LED Brake, Turn, Tail Lights for Chevy Trucks Fits: 2020-2023 Chevrolet & GMC 2500 & 3500 Trucks - Excludes Trucks with CarbonPro Bed
Item #: PUCP7543BA
Condition:
New
Price: $899.00
Truck Cab Protector / Headache Rack
Description: B&W Custom Headache Rack w/ LED Brake, Turn, Tail Lights for Chevy Trucks Fits: 2020-2023 Chevrolet & GMC 2500 & 3500 Trucks - Excludes Trucks with CarbonPro Bed
Item #: PUCP7543WA
Condition:
New
Price: $899.00
Tonneau Cover
Description: Revolver X4s Hard Rolling Truck Bed Cover - 2020-2024 Chevy Silverado/GMC Sierra 2500 HD/3500 HD 8' Bed Application Summary: 2020-2024 Chevrolet Silverado 2500 HD 98.2 Bed, 2020-2024 Chevrolet...More Details »
Item #: 80134
Condition:
New
Price: $1,399.99
MAP Sensor Spacer
Description: Extends MAP Sensor Life
Protects sensor from soot buildup
MAP Sensor Relocator
FOR 2017-2025 CHEVY/GMC 2500/3500 6.6L L5P
Item #: 64410
Condition:
New
Price: $76.67
Sale: $69.00
Save: 10%
Save: $7.67
Description: Banks iDash Pro, Universal CAN, Stand-Alone for ALL 2008+ OBDII CAN bus vehicles Note: Universal CAN, Stand-Alone Standard 52mm size
Mount Not Included, Checkout the 3D Print Tab for our in...More Details »
Item #: 66710
Condition:
New
Price: $419.00
Exhaust System / Air Intake Assembly / Turbocharger Kit
Description: Monster Exhaust System, 5-inch Single Exit, Chrome SideKick Tip for 2020-2023 Chevy/GMC 2500/3500 6.6L Duramax, L5P Fits: for 2020-2023 Chevy/GMC 2500/3500 6.6L Duramax, L5P
Item #: 48997-B
Condition:
New
Price: $698.00
Sale: $628.20
Save: 10%
Save: $69.80
Exhaust System / Air Intake Assembly / Turbocharger Kit
Description: Monster Exhaust System, 5-inch Single Exit, Chrome SideKick Tip for 2020-2023 Chevy/GMC 2500/3500 6.6L Duramax, L5P Fits: for 2020-2021 Chevy/GMC 2500/3500 6.6L Duramax, L5
Item #: 48997
Condition:
New
Price: $698.00
Sale: $628.20
Save: 10%
Save: $69.80
Multi-Purpose Gauge
Description: Banks iDash 1.8 SuperGauge, Universal CAN, for use with PedalMonster for ALL 2008+ OBDII CAN bus vehicles Note: Upgrade and control your PedalMonster. Display 2-8 values with over 300...More Details »
Item #: 66568
Condition:
New
Not Available
Ignition Performance Module
Description: Derringer Tuner, Requires iDash 1.8 (not included) for 2020-23 Chevy/GMC 2500/3500 6.6L Duramax, L5P Note: Derringer features 6 power levels adjustable on-the-fly. Interfaces with OBD-II...More Details »
Item #: 67100
Condition:
New
Not Available
Ignition Performance Module
Description: Derringer Tuner, with SuperGauge, includes ActiveSafety and Banks iDash 1.8 SuperGauge for 2020-23 Chevy/GMC 2500/3500 6.6L Duramax, L5P Note: Derringer features 6 power levels adjustable...More Details »
Item #: 67102
Condition:
New
Not Available
Item #: 26005
Condition:
New
Price: $775.56
Sale: $698.00
Save: 10%
Save: $77.56
Description: For 2020-2024 Chevy/GMC 2500/3500 6.6L Diesel L5P
Item #: 35137-B
Condition:
New
Price: $476.67
Sale: $429.00
Save: 10%
Save: $47.67
Description: -Adds +117 hp +225 lb-ft
-6 power levels that can be changed on-the-fly via iDash. Each level adds approx 23 hp
-Interfaces with OBD-II Port (On-Board Diagnostics) to communicate with vehicle's...More Details »
Item #: 67126
Condition:
New
Estimated to ship Early August
Price: $1,197.78
Sale: $1,078.00
Save: 10%
Save: $119.78
Description: -Adds +117 hp +225 lb-ft
-6 power levels that can be changed on-the-fly via iDash. Each level adds approx 23 hp
-Interfaces with OBD-II Port (On-Board Diagnostics) to communicate with vehicle's...More Details »
Item #: 67106
Condition:
New
Estimated to ship Early August
Price: $1,108.89
Sale: $998.00
Save: 10%
Save: $110.89
Data Logging Unit
Description: Banks iDash 1.8 DataMonster, Universal CAN, Stand- Alone for ALL 2008+ OBDII CAN bus vehicles Note: Universal CAN, Stand-Alone Standard 52mm size
Item #: 66760
Condition:
New
Not Available
Multi-Purpose Gauge
Description: Banks iDash 1.8 SuperGauge, Universal CAN, Gauge Expansion Kit for ALL 2008+ OBDII CAN bus vehicles Note: Universal CAN, Gauge Expansion Kit Standard 52mm size
Item #: 66562
Condition:
New
Not Available
Turbo Inlet Horn, Intake Manifold
Description: The Banks Monster-Ram Turbo Inlet for the 2017-2025 Duramax L5P is the only intake elbow that outperforms stock without the destructive effects of turbo surge. More than a year in development, the...More Details »
Item #: 42792-N
Condition:
New
50-State Emission Compliant CARB-EO D-161-158
Price: $321.11
Sale: $289.00
Save: 10%
Save: $32.11
Turbo Inlet Horn, Intake Manifold
Description: The Banks Monster-Ram Turbo Inlet for the 2017-2025 Duramax L5P is the only intake elbow that outperforms stock without the destructive effects of turbo surge. More than a year in development, the...More Details »
Item #: 42792-R
Condition:
New
50-State Emission Compliant CARB-EO D-161-158
Price: $332.22
Sale: $299.00
Save: 10%
Save: $33.22
Throttle Assist
Description: PedalMonster, for use with existing iDash and/or Derringer for many Cadillac, Chevy/GMC, Chrysler, Dodge/Ram, Ford, Jeep, Lincoln, Mazda (check fitment)
Item #: 64311
Condition:
New
Not Available
Throttle Assist
Description: PedalMonster, Standalone for many Cadillac, Chevy/GMC, Chrysler, Dodge/Ram, Ford, Jeep, Lincoln, Mazda (check fitment)
Item #: 64310
Condition:
New
Not Available
Throttle Assist
Description: PedalMonster, with iDash SuperGauge for many Cadillac, Chevy/GMC, Chrysler, Dodge/Ram, Ford, Jeep, Lincoln, Mazda (check fitment)
Item #: 64312
Condition:
New
Not Available
Throttle Assist
Description: PedalMonster, with iDash DataMonster for many Cadillac, Chevy/GMC, Chrysler, Dodge/Ram, Ford, Jeep, Lincoln, Mazda (check fitment)
Item #: 64313
Condition:
New
Not Available
Banks Power Pedal Monster Throttle Sensitivity Booster for Use w/ Exst. iDash - 2020+ GM 2500/3500HD
Throttle Assist
Description: PedalMonster, Throttle Sensitivity Booster for use with existing iDash and/or Derringer for 2020+ GM 2500/3500HD
Item #: 64311
Condition:
New
Price: $354.44
Sale: $319.00
Save: 10%
Save: $35.44
Description: For 2020-2025 Chevy/GMC 2500/3500 6.6L Diesel
with 10 speed Allison 10L1000 Transmission
Will NOT work with AEV skid plates.
Item #: 35148-B
Condition:
New
Price: $476.67
Sale: $429.00
Save: 10%
Save: $47.67
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: $157.00
Sale: $105.00
Save: 33%
Save: $52.00
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: $133.00
Sale: $89.00
Save: 33%
Save: $44.00
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: $164.00
Sale: $118.00
Save: 28%
Save: $46.00
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: $164.00
Sale: $118.00
Save: 28%
Save: $46.00
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: $164.00
Sale: $118.00
Save: 28%
Save: $46.00
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: $164.00
Sale: $118.00
Save: 28%
Save: $46.00
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: $289.00
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: $289.00
Suspension Shock Absorber
Description: 46mm Monotube Shock Absorber
Item #: 25-311891
Condition:
New
Price: $289.00
Suspension Shock Absorber Reservoir Mount
Description: Reservoir Bracket Assembly
Item #: 11-176015
Condition:
New
Price: $42.00
Pitman Arm Support
Item #: 110-90772
Condition:
New
Price: $259.95
Description: Easy Installation
No trimming is required to install if leaving off the factory mud guards
Mild steel silver zinc plating for corrosion resistance
30-minute DIY install time
Made in the USA...More Details »
Item #: 110-91193
Condition:
New
Price: $99.95
Description: One extra high strength dowel pin
Item #: 29601
Condition:
New
Price: $2.50
Description: L5P CP3 Conversion Kit with 14mm CP3 pump.
Item #: D06-C14-146
Condition:
New
Price: $4,250.00
Sale: $4,207.50
Save: 1%
Save: $42.50
Drop-In Turbocharger
Description: Brand New Turbo. No core charge
650-700HP Rating
100% Drop In
Item #: D06-T642-001
Condition:
New
Price: $2,795.00
Sale: $2,767.05
Save: 1%
Save: $27.95
Drop-In Turbocharger
Description: Brand New Turbo. No core charge
750-800HP Rating
100% Drop In
Recommended injector size of 100% overs to reach max potential.
Item #: D06-T662-001
Condition:
New
Price: $2,895.00
Sale: $2,866.05
Save: 1%
Save: $28.95
Item #: DMAX-EOC
Condition:
New
Price: $39.99
Item #: DMAX-BFC-6.6 + DMAX-BDC-2024
Condition:
New
Price: $90.48
Price: $54.25
Item #: DMAX-BFC-6.6LOCK + DMAX-BDC-2024
Condition:
New
Price: $114.93
Item #: DMAX-BFC-6.6LOCK
Condition:
New
Price: $79.99
Price: $158.99
Head Gasket Kit
Description: Includes
Mahle Upper Engine Gasket Kit
Mahle Grade C Head Gaskets
DogBone Head Studs
Item #: DogBone-L5P-HGK-STUDS
Condition:
New
Price: $999.00
Sale: $899.10
Save: 10%
Save: $99.90
Price: $59.99
Sale: $53.99
Save: 10%
Save: $6.00
Limited Supply: Only 8 Left!
Price: $20.95
Sale: $18.86
Save: 10%
Save: $2.09
Description: Same tensile strength as ARP, at a more affordable price.
Item #: DogBone-HSK-17D
Condition:
New
Limited Supply: Only 5 Left!
Price: $419.00
Sale: $377.10
Save: 10%
Save: $41.90
Cap for L5P Intake Horn
Description: Fits L5P Intake Horn PCV Provision
Item #: DogBone-7/8-L5P-CAP-KIT
Condition:
New
Price: $17.89
Sale: $16.10
Save: 10%
Save: $1.79
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
Sale: $7.64
Save: 10%
Save: $0.85
Description: -M8-1.25 thread size, 30mm thread length
-220+ KPSI tensile strength
-12-point bolt head
-Black oxide finish
-Lube Pack
Item #: DogBone-UPBK-L5P
Condition:
New
Price: $23.99
Sale: $21.59
Save: 10%
Save: $2.40
Fuel Injector
Item #: DDP L5P-100
Condition:
New
Price: $3,850.00
Sale: $3,108.88
Save: 19%
Save: $741.12
Fuel Injector
Item #: DDP L5P-50
Condition:
New
Price: $3,650.00
Sale: $2,947.38
Save: 19%
Save: $702.62
Fuel Injector
Item #: DDP L5P-STK
Condition:
New
Price: $365.00
Sale: $294.74
Save: 19%
Save: $70.26
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: $1,049.95
Sale: $944.96
Save: 10%
Save: $104.99
Description: Exergy 2017+ L5P Stock Replacement Injector
Item #: E02 10701
Condition:
New
Price: $2,400.00