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UnderDog Diesel » 2025, GMC, Sierra 3500
Products for:
- Year: 2025
- Make: GMC
- Model: Sierra 3500
View Universal items for: 2025 GMC Sierra 3500
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Items 1-60 of 113
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Resonator Delete
Description: 3D Printed in House
Extra Durable ASA Plastic infused with Carbon Fiber
No Tuning Needed
Item #: DogBone-L5P-RES
Condition:
New
Price: $19.99
Sale: $17.99
Save: 10%
Save: $2.00
Oil Filler Neck
Description: This kit is a replacement for aftermarket CCV kits, such as the old JZM, DNA Distributors, SPELAB, VSE Kits.
6.875" Tall, ~ 1" Taller than other kits on the market. (2.5" Taller than the Old JZM Kit)
Cam-Lock Cap w/ O-ring Seal
Item #: JZM-L5P-OILFILL-KIT
Condition:
New
Price: $179.99
Description: Filters Included
Item #: VSE-L5P-FSS
Condition:
New
Raw Aluminum - 5 business day lead time | Midnight Black - 10-15 business day lead time | Ground shipping only
Price: $478.99
Catch Can Kit
Description: Fits:
ALL 2020-2025 6.6L GM Duramax equipped pickup trucks
ALL 2020-2025 6.6L GM Duramax equipped cab and chassis models.
Works with stock CCV & Aftermarket CCV Kits*
*If the truck is a...More Details »
Item #: VSE-20-24-L5P-CC
Condition:
New
(Raw - Ships in 3-5 Business Days)
(Midnight Black - Estimated 10-15 Business Day Lead Time)
Price: $399.99
Description: Will NOT fit Pro Model Truck
Item #: UDD-2024-52MM-Mount-D
Condition:
New
Price: $85.00
Sale: $68.00
Save: 20%
Save: $17.00
Description: Will NOT fit Pro Model Truck
Item #: UDD-2024-52MM-Mount-S
Condition:
New
Price: $65.00
Sale: $52.00
Save: 20%
Save: $13.00
NEW!
Description: - Airflow Capable of Supporting up to 700HP
- Custom Billet Compressor Wheel
- Turbine Wheel and Nozzle Ring Upgrades
- Improved EGT Control
- Compressor and turbine wheel durability upgrades...More Details »
Item #: DM1QQ1070200000
Condition:
New
Price: $3,100.00
NEW!
Description: - Airflow capable of supporting up to 750HP
- Compressor and turbine wheel durability upgrades
- Custom Billet compressor wheel
- Turbine Wheel and Nozzle Ring Upgrades
- Major top end EGT...More Details »
Item #: DM1QQ1070303000
Condition:
New
Price: $3,500.00
NEW!
Description: - Extra airflow to make 80-100rwhp over 'Tune only' L5P
- Works with box tuners, custom tuning, or without tuning
- Major EGT control improvements compared to stock
- Built to last with more...More Details »
Item #: DM1QQ1070103000
Condition:
New
Price: $2,400.00
Raw - 5-7 Business Day Lead Time | Black - 10-20 Business Day Lead Time
Price: $398.99
This item is non-returnable. Sales are final.
Price: $129.00
Description: Allows for complete removal of the flexible line
Caps off the hardline at the frame.
Truck must be tuned for off-road use only.
Item #: UDD-D49-9.49
Condition:
New
In stock.
Price: $5.99
Sale: $5.39
Save: 10%
Save: $0.60
Injection Pump
Item #: AP54951
Condition:
New
Price: $831.12
Injection Pump
Item #: AP54950
Condition:
New
Price: $613.34
Running Board
Description: PowerStep Plug-N-Play Automatic Power-Deploying Running Boards fits 2022 Chevy Silverado 1500/GMC Sierra 1500 Double/Crew Cab; Includes Gas and Diesel Fits: 2022 Chevrolet Silverado 1500 Crew Cab...More Details »
Item #: 76255-01A
Condition:
New
Price: $1,799.99
Sale: $1,599.99
Save: 11%
Save: $200.00
MAP Sensor Spacer
Description: Extends MAP Sensor Life
Protects sensor from soot buildup
Lower & Upper MAP Sensor Relocator
FOR 2023-2025 CHEVY/GMC 2500/3500 6.6L L5P
This is for both MAP Sensors, if you already have the upper, please purchase 64414
Item #: 64415
Condition:
New
Price: $143.33
Sale: $129.00
Save: 10%
Save: $14.33
MAP Sensor Spacer
Description: Extends MAP Sensor Life
Protects sensor from soot buildup
Lower MAP Sensor Relocator
FOR 2023-2025 CHEVY/GMC 2500/3500 6.6L L5P
This is for the lower MAP sensor only. This kit is intended for...More Details »
Item #: 64414
Condition:
New
Price: $76.67
Sale: $69.00
Save: 10%
Save: $7.67
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
Item #: 26005
Condition:
New
Price: $775.56
Sale: $698.00
Save: 10%
Save: $77.56
Description: iDash Pro Required! Not included. DOES NOT WORK WITH IDASH SUPERGAUGE OR DATAMONSTER
-Adds 86 hp and 178 lb-ft at the wheels
-6 power levels that can be changed on-the-fly via iDash...More Details »
Item #: 67137
Condition:
New
Estimated to ship Early August
Price: $1,086.67
Sale: $978.00
Save: 10%
Save: $108.67
Description: -Adds 86 hp and 178 lb-ft at the wheels
-6 power levels that can be changed on-the-fly via iDash
-Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
-Warranty friendly:...More Details »
Item #: 67128
Condition:
New
Estimated to ship Early August
Price: $1,642.22
Sale: $1,478.00
Save: 10%
Save: $164.22
Description: -Adds 86 hp and 178 lb-ft at the wheels
-6 power levels that can be changed on-the-fly via iDash
-Interfaces with OBD (On-Board Diagnostics) to communicate with vehicle's ECM
-Warranty friendly:...More Details »
Item #: 67108
Condition:
New
Price: $1,553.33
Sale: $1,398.00
Save: 10%
Save: $155.33
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
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
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: 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
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
Pigtail
Item #: FPE-HAR-CUMM-ALT-0722
Condition:
New
Price: $20.99
Sale: $17.84
Save: 15%
Save: $3.15
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
Sale: $194.65
Save: 15%
Save: $34.35
Item #: FPE-L5P-MAP-SPR-24
Condition:
New
Price: $68.99
Sale: $58.64
Save: 15%
Save: $10.35
Description: Tune your 2024-2025 Silverado/Sierra 2500/3500 with the 6.6L L5P Duramax (E42 ECM) now using HP Tuners’ VCM Suite! This service is required to upgrade the E42 ECM in these diesel trucks for...More Details »
Item #: ECM-E42-L5P-U
Condition:
New
Lead Time is 3-5 Business Days once HP Tuners receives your ECM (not including shipping)
A shipping form will be emailed to you after purchase. Please ensure correct email at checkout to prevent further delays.
Price: $999.99
NEW!
Item #: HSP-D-605-2D-HSP-RAW
Condition:
New
Price: $320.00
Sale: $304.00
Save: 5%
Save: $16.00
Description: Fits; 2001-2023 Chevrolet and GMC 1500HD / 2500 / 2500HD / 3500 / 3500HD 2WD/4WD trucks, 2001-2013 Chevy and GMC 2500 2WD/4WD SUVs and Hummer H2, H2 SUTs. 1999-2018 Chevy and GMC 1500 6 Lug Trucks
Item #: KR86325
Condition:
New
Price: $19.99
Sale: $18.99
Save: 5%
Save: $1.00
Description: Fits; 2015-2025 Chevy/GMC 2500/3500 HD *WITHOUT FACTORY TABS*
***Will work with PISK systems in place***
Item #: KRSS15FOX
Condition:
New
Price: $339.99
Sale: $322.99
Save: 5%
Save: $17.00
Description: Fits; 2011-2025 Chevy/GMC 2500/3500 HD *WITHOUT FACTORY TABS
Item #: KRSS15
Condition:
New
Price: $99.99
Sale: $94.99
Save: 5%
Save: $5.00
Description: Fits; 1988-Current Chevy/GMC 1500HD/2500HD/3500 TRUCKS and Much More, This is a popular Bolt on Style Ball Joint for many aftermarket applications Including Off-Road Jeep and Toyota Fitment. *GM...More Details »
Item #: KR6292
Condition:
New
Price: $59.99
Sale: $56.99
Save: 5%
Save: $3.00
Description: Fits; 2011-2025 Chevrolet and GMC 2500HD/3500 Trucks, Also 2015-2018 Chevy and GMC Canyon / Colorado Trucks.
Item #: KR86376
Condition:
New
Price: $99.99
Sale: $94.99
Save: 5%
Save: $5.00
Description: Part# KRSM10-50 (50mm Reservoir) Fits: Rad Flo, (King 2.5 OEM Series w/ 2" reservoir)(CALL FOR FITMENT on Bilstein B8 5160)
Fits; 2011+ Chevy/GMC 2500/3500 HD
*SOLD AS A PAIR
Item #: KRSM11-50
Condition:
New
Price: $179.99
Sale: $170.99
Save: 5%
Save: $9.00
Description: Part# KRSM11-55 (55mm Reservoir) Fits: Fox 2.0 Performance Series,
Fits; 2011+ Chevy/GMC 2500/3500 HD
*SOLD AS A PAIR
Item #: KRSM11-55
Condition:
New
Price: $179.99
Sale: $170.99
Save: 5%
Save: $9.00
Description: Part# KRSM11-65 (65mm Reservoir) Fits: Fox 2.5 Race Series, Vertex 2.5, Elka 2.5
Fits; 2011+ Chevy/GMC 2500/3500 HD
*SOLD AS A PAIR
Item #: KRSM11-65
Condition:
New
Price: $179.99
Sale: $170.99
Save: 5%
Save: $9.00
Description: Fits; 2011-2025 Chevrolet and GMC 2500HD/3500 Trucks.
Item #: 11KDG018
Condition:
New
Price: $299.99
Sale: $284.99
Save: 5%
Save: $15.00
Description: Fits; 2011-2025 2500/3500 GM HD Truck
Item #: KR280
Condition:
New
Price: $239.99
Sale: $227.99
Save: 5%
Save: $12.00
Description: Fits; 2011-2025 Chevy/GMC 2500/3500 HD TRUCK
Item #: KRISP11
Condition:
New
Price: $549.99
Sale: $522.49
Save: 5%
Save: $27.50
Description: Fits; 2011-2025 Chevy/GMC 2500HD/3500 GM Trucks
Item #: KR419A
Condition:
New
Price: $239.99
Sale: $227.99
Save: 5%
Save: $12.00
Description: Fits; 2011-2025 2500/3500 GM HD Truck
Item #: KRTR11
Condition:
New
Price: $379.99
Sale: $360.99
Save: 5%
Save: $19.00
Description: Fits; 2011-2025 GM HD Trucks (2500HD/3500)
***SRW ONLY (Single Rear Wheel)***
Item #: KRP0175
Condition:
New
Price: $9.99
Sale: $9.49
Save: 5%
Save: $0.50
Description: Fits; 2011-2025 Chevy/GMC 2500/3500 HD
Item #: KRGUSSET11
Condition:
New
Price: $89.99
Sale: $85.49
Save: 5%
Save: $4.50
Description: Fits; 2020-2025 CHEVY/GMC 2500/3500 HD
Item #: KRKEY20
Condition:
New
Price: $119.99
Sale: $113.99
Save: 5%
Save: $6.00
Description: Fits; 2011-2025 GM HD Trucks 2500HD/3500
Item #: KR0232
Condition:
New
Price: $59.99
Sale: $56.99
Save: 5%
Save: $3.00
Description: Fits; 2011-2025 CHEVY/GMC 2500/3500 HD
Will NOT fit on 2024+ AT4X & ZR2 trucks equipped with DSSV shocks.
Item #: KRSE11
Condition:
New
Price: $89.99
Sale: $85.49
Save: 5%
Save: $4.50
Description: Fits; 2011-2025 GMC/Chevrolet 2500HD/3500 Trucks. Also 2007-2018 1500 Silverado, Sierra. And 2007-2019; Escalade, Avalanche, Suburban, Tahoe, Yukon, 6 Lug Trucks.
Item #: KRSLV11
Condition:
New
Price: $34.99
Sale: $33.24
Save: 5%
Save: $1.75
Description: Fits; 2011-2025 Chevy/GMC 2500/3500 HD
Item #: KR11SSU78
Condition:
New
Price: $599.99
Sale: $569.99
Save: 5%
Save: $30.00
Description: Fits; 2011-2025 Chevy/GMC 2500/3500 HD
(Factory Taper Size)
Item #: KRCLP11
Condition:
New
Price: $799.99
Sale: $759.99
Save: 5%
Save: $40.00
Description: Fits; 2020-2025 Chevy/GMC 2500/3500 HD
Will NOT fit on AT4X & ZR2 trucks equipped with DSSV shocks.
Item #: KR20STAGE1
Condition:
New
Price: $169.99
Sale: $161.49
Save: 5%
Save: $8.50
Items 1-60 of 113
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