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UnderDog Diesel » 2021, GMC, Sierra 3500
Products for:
- Year: 2021
- Make: GMC
- Model: Sierra 3500
View Universal items for: 2021 GMC Sierra 3500
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Turbo Up-Pipes
Item #: L5P-UP-PIPE
Condition:
New
*Allow 5-7 business days for processing from the manufacturer*
This product cannot ship to California.
Price: $599.99
Small Lead Time on Raw, 10-15 Business Days on Black
This product cannot ship to California.
Price: $379.99
NEW!
Catch Can Kit
Description: Fits:
ALL 2020-2024 6.6L GM Duramax equipped pickup trucks
ALL 2020-2024 6.6L GM Duramax equipped cab and chassis models.
Works with stock CCV & Aftermarket CCV Kits
Item #: VSE-20-24-L5P-CC
Condition:
New
Limited Supply
Shipping after Jan 1st.
Price: $399.99
Diff Covers
Description: Pro Series Rear Differential Cover Black w/ Machined Fins GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 46-71260B
Condition:
New
Price: $355.00
Gauges
Description: AGD 5-1/2 IN Digital Gauge Display Monitor Fits: Dodge/RAM/Ford/GM Diesel Trucks 08-19 L6-6.7L (td)/V8-6.4L/6.6L/6.7L (td)
Item #: 77-91001
Condition:
New
Price: $518.00
No Image Available
Intercooler Hose Kit
Description: BladeRunner 3 IN Aluminum Hot and Cold Charge Pipe Kit Black GM Trucks 20-21 V8-6.6L (td) Fits: GM Diesel Trucks 20-21 V8-6.6L (td) L5P
Item #: 46-20444-B
Condition:
New
Price: $630.00
Exhaust System Kit
Description: Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust System w/Black Tip GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 49-44126-B
Condition:
New
Price: $785.00
Exhaust System Kit
Description: Large Bore-HD 4 IN 409 Stainless Steel DPF-Back Exhaust System w/Polished Tip GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 49-44126-P
Condition:
New
Price: $712.00
Exhaust System Kit
Description: Large Bore-HD 5 IN 409 Stainless Steel DPF-Back Exhaust System w/Black Tip GM Diesel Trucks 20-21 V8-6.6L (td) L5P Fits: GM Diesel Trucks 20-21 V8-6.6L (td) L5P
Item #: 49-44125-B
Condition:
New
Price: $557.00
Exhaust System Kit
Description: Large Bore-HD 5 IN 409 Stainless Steel DPF-Back Exhaust System w/Polished Tip GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 49-44125-P
Condition:
New
Price: $530.00
Air Filter
Description: Magnum FLOW OE Replacement Air Filter w/ Pro 5R Media GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 30-10325
Condition:
New
Price: $93.00
No Image Available
Air Filter
Description: Magnum FLOW OE Replacement Air Filter w/ Pro DRY S Media GM Diesel Trucks 20-21 V8-6.6L (td) L5P Fits: GM Diesel Trucks 20-21 V8-6.6L (td) L5P
Item #: 31-10325
Condition:
New
Price: $93.00
Air Filters - Direct Fit
Description: Magnum FLOW OE Replacement Air Filter w/ Pro 5R Media GM Silverado/Sierra 1500 2019 V6-2.7L/4.3L/V8-5.3/6.2L Fits: 2019-2019 Chevrolet Silverado 1500 (Liter: 2.7, 5.3, 4.3, 6.2 & Cylinder: 4, 6, 8...More Details »
Item #: 30-10292
Condition:
New
Price: $84.00
Air Filters - Universal Fit
Description: Magnum FLOW OE Replacement Air Filter w/ Pro DRY S Media GM Silverado/Sierra 1500 2019 V6-2.7L/4.3L/V8-5.3/6.2L Fits: 2019-2019 Chevrolet Silverado 1500 (Liter: 2.7, 5.3, 4.3, 6.2 & Cylinder: 4, 6,...More Details »
Item #: 31-10292
Condition:
New
Price: $84.00
Cold Air Intakes
Description: Momentum GT Cold Air Intake System w/ Pro 5R Media GM Trucks 2500/3500HD 2020 V8-6.6L Fits: GM Trucks 2500/3500HD 2020 V8-6.6L
Item #: 50-70055R
Condition:
New
Price: $416.00
Engine Cold Air Intake
Description: Momentum HD Cold Air Intake System w/ Pro DRY S Media GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 50-70056D
Condition:
New
Price: $416.00
Engine Cold Air Intake
Description: Momentum HD Cold Air Intake System w/ Pro 10R Media GM Diesel Trucks 2020 V8-6.6L (td) L5P Fits: GM Diesel Trucks 2020 V8-6.6L (td) L5P
Item #: 50-70056T
Condition:
New
Price: $416.00
Programmers & Tuners
Description: Sprint Booster Power Converter GM Silverado/Sierra 1500 2019 V6-2.7L/4.3L/V8-5.3/6.2L Fits: GM Silverado/Sierra 1500 2019 L4-2.7L (t)/V6-4.3L/V8-5.3/6.2L
Item #: 77-14009
Condition:
New
Price: $297.00
Oil Filters
Description: Pro GUARD D2 Oil Filter Ford Vehicles 08-19 V6-3.5L/3.7L/V8-5.0L / GM Vehicles 14-19 V8-5.3LÂ Fits: Ford F-150 15-17 V6-3.5L (tt)
Item #: 44-lf038
Condition:
New
Price: $20.00
Fuel Filters
Description: Pro GUARD D2 Fuel Filter (4 Pack) GM Diesel Trucks 17-21 V8-6.6L (td) / 20-21 L6-3.0L (td) Fits: GM Diesel Trucks 17-21 V8-6.6L (td) / 20-21 L6-3.0L (td)
Item #: 44-FF023-MB
Condition:
New
Price: $85.00
Fuel Filters
Description: Pro GUARD D2 Fuel Filter GM Diesel Trucks 17-21 V8-6.6L (td) / 20-21 L6-3.0L (td) Fits: GM Diesel Trucks 17-21 V8-6.6L (td) / 20-21 L6-3.0L (td)
Item #: 44-FF023
Condition:
New
Price: $28.00
Oil Filters
Description: Pro GUARD D2 Oil Filter (4 Pack) Ford Vehicles 08-15 V6-3.5L(tt)/3.7L/V8-5.0L Fits: Ford Vehicles 08-15 V6-3.5L(tt)/3.7L/V8-5.0L
Item #: 44-LF025-MB
Condition:
New
Price: $54.97
In-Line Modules
Description: SCORCHER BLUE Bluetooth Capable Power Module GM Diesel Trucks 17-19 V8-6.6L (td) L5P Fits: GM Diesel Trucks 17-18 V8-6.6L (td) L5P
Item #: 77-84010
Condition:
New
Price: $554.00
In-Line Modules
Description: SCORCHER BLUE Bluetooth Power Module & AGD Advanced Gauge Display Monitor Combo GM Diesel Trucks 17-20 V8-6.6L (td) L5P Fits: GM Diesel Trucks 17-20 V8-6.6L (td) L5P
Item #: 77-84010-AGD
Condition:
New
Price: $999.00
In-Line Modules
Description: SCORCHER HD Power Module GM Diesel Trucks 17-19 V8-6.6L (td) L5P Fits: GM Diesel Trucks 17-18 V8-6.6L (td) L5P
Item #: 77-44010
Condition:
New
Price: $442.00
Diff Covers
Description: Street Series Rear Differential Cover Raw w/ Machined Fins GM Trucks 20-21 V8-6.6L (AAM 11.5/12.0-14) Fits: GM Trucks 20-21 V8-6.6L (AAM 11.5/12.0-14)
Item #: 46-71260A
Condition:
New
Price: $289.00
Headers & Manifolds
Description: Twisted Steel 304 Stainless Steel Short Tube Header GM Trucks 2500/3500HD 20-23 V8-6.6L L8T Fits: GM Trucks 2500/3500HD 20-23 V8-6.6L L8T
Item #: 48-34145
Condition:
New
Price: $1,052.00
Air Suspension Helper Spring Kit
Description: LoadLifter 5000 ULTIMATE Leaf spring air spring kit with internal jounce bumper
Item #: 88341
Condition:
New
Price: $962.37
Air Suspension Helper Spring Kit
Description: The LoadLifter 7500 XL Ultimate offers greater leveling strength for towing and hauling with 7 inch double bellows air springs and up to 7500 lbs. load-leveling capacity. The fully adjustable kit...More Details »
Item #: 57541
Condition:
New
Price: $1,105.65
Suspension Leveling Kit
Description: LoadLifter 5000; Leaf Spring Leveling Kit.
Item #: 57341
Condition:
New
Price: $768.74
Running Board
Description: PowerStep SmartSeries Running Board fits 2019-2021 Silverado/Sierra 1500, 2020-2023 Silverado/Sierra 2500/3500 Double/Crew Cab
Item #: 86254-01A
Condition:
New
Price: $1,949.99
Running Board
Description: PowerStep XL?
Item #: 77254-01A
Condition:
New
Price: $2,299.99
Truck Cab Side Step
Description: BedStep® - Retractable Rear Bumper Access Step Fits: 2020-2021 Chevrolet Silverado 2500 HD; 2020-2021 Chevrolet Silverado 2500 HD; 2020-2021 Chevrolet Silverado 3500 HD; 2020-2021 Chevrolet...More Details »
Item #: 75327-01A
Condition:
New
Price: $329.99
Truck Cab Side Step
Description: Bedstep 2 Retractable Bed Side Step fits 2020-2020 Chevrolet Silverado/Sierra 2500/3500 Fits: 2020 Chevrolet Silverado 2500 HD, 2020 Chevrolet Silverado 3500 HD, 2020 GMC Sierra 2500 HD, 2020 GMC Sierra 3500 HD
Item #: 75418-01A
Condition:
New
Price: $329.99
Running Board
Description: PowerStep?
Item #: 76254-01A
Condition:
New
Price: $1,799.99
Running Board
Description: PowerStep ? Xtreme
Item #: 78254-01A
Condition:
New
Price: $2,199.99
Transmission Cooler Lines
Item #: 314-005-4272
Condition:
New
Price: $35.00
Fifth Wheel Trailer Hitch Slider
Description: The Companion 5th Wheel Hitch was designed to address the issue of sloppiness in hitches. The result is a quiet, cushioned ride that is free of jerking. And it's easily removable with its...More Details »
Item #: RVB3775
Condition:
New
Price: $1,200.00
Gooseneck Trailer Hitch Kit
Description: Custom mounting bracket and center kit for trucks. No-drill, bolt-on application. Fits: 2020-2024 Chevrolet & GMC 2500 & 3500 Trucks - Excludes Trucks with CarbonPro Bed
Item #: GNRK1020
Condition:
New
Price: $699.00
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: $69.00
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: $628.20
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: $628.20
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
Price: $279.00
Multi-Purpose Gauge
Description: Banks iDash 1.8 SuperGauge, Universal CAN, Stand-Alone for ALL 2008+ OBDII CAN bus vehicles Note: Universal CAN, Stand-Alone Standard 52mm size
Item #: 66560
Condition:
New
Price: $295.00
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
Price: $490.00
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
Price: $769.00
Description: For 2020-2024 Chevy/GMC 2500/3500 6.6L Diesel L5P
Item #: 35137-B
Condition:
New
Price: $664.44
Sale: $598.00
Save: 10%
Save: $66.44
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
Price: $419.00
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
Price: $269.00
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: $289.00
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: $299.00
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
Price: $295.00
Throttle Assist
Description: PedalMonster, Standalone for many Cadillac, Chevy/GMC, Chrysler, Dodge/Ram, Ford, Jeep, Lincoln, Mazda (check fitment)
Item #: 64310
Condition:
New
Price: $295.00
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
Price: $575.00
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
Price: $695.00
Description: For 2020-2024 Chevy/GMC 2500/3500 6.6L Diesel
with 10 speed Allison 10L1000 Transmission
Item #: 35148-B
Condition:
New