- Home »
- Catalog
UnderDog Diesel » 2026, Sierra 2500
Products for:
- Year: 2026
- Model: Sierra 2500
View Universal items for: 2026 Sierra 2500
Browse Products
Items 1-20 of 20
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
Description: Fitment Note:
Stock Cold Side Piping
WCFAB Cold Side Piping (Uses Billet Adapter/Coupler that came with the WCFAB Piping)
Item #: 24-25-TV-UPG-STOCK
Condition:
New
Limited Supply: Only 3 Left!
Price: $259.99
Description: -Huge increase in size and flow over stock and competitors (3.5" vs 2.5")
-Hot Side flows 490 CFM @ 12" vs stock 388 CFM
-Cold Side flows 635 CFM @ 12" vs stock 435 CFM
-Constant 3.5in diameter...More Details »
Item #: 26005
Condition:
New
Price: $775.56
Sale: $698.00
Save: 10%
Save: $77.56
Engine Oil Pan
Description: For 2020-2026 Chevy/GMC 2500/3500 6.6L Diesel L5P
If the truck has a lift kit, contact us to verify fitment before purchase.
Item #: 35137-B
Condition:
New
Currently on Back Order
Price: $476.67
Sale: $429.00
Save: 10%
Save: $47.67
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
Limited Supply: Only 4 Left!
50-State Emission Compliant CARB-EO D-161-158
Price: $332.22
Sale: $299.00
Save: 10%
Save: $33.22
Description: For 2020-2026 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
Limited Supply: Only 3 Left!
Price: $476.67
Sale: $429.00
Save: 10%
Save: $47.67
HP Tuners Custom Tuning
Description: All SALES OF THIS PRODUCT ARE FINAL. NO REFUNDS, RETURNS, OR EXCHANGES PERMITTED.
Item #: DSP-GM-HPT-24
Condition:
New
This product cannot ship to California.
Price: $1,650.00
NEW!
Description: Tuning Required
Now with Flush Flange at the Turbocharger
Item #: 255-01301
Condition:
New
Price: $334.75
Item #: 255-04604
Condition:
New
Price: $749.99
Item #: DMAX-BFC-6.6 + DMAX-BDC-2024
Condition:
New
Price: $90.48
Item #: FPE-L5P-MAP-SPR
Condition:
New
Price: $68.99
Description: Tune your 2024-2026 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
Description: HP Tuners is thrilled to offer support for the GM Global B T93 TCM found in various GM vehicles equipped with the GM 10L80 10-speed transmission. This upgrade service is required to enable...More Details »
Item #: TCM-GB-T93-UO
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: $399.99
Item #: HSP-D-605-2D-HSP-Raw
Condition:
New
Ships in 2 - 3 Weeks / Unless Informed Otherwise
Price: $320.00
Sale: $304.00
Save: 5%
Save: $16.00
Description: Fits:
2020+ Chevrolet Silverado 2500HD / 3500HD
2020+ GMC Sierra 2500HD / 3500HD
Important Fitment Details:
This system will NOT work with Aftermarket Sway Bars. Be sure to confirm your sway bar diameter is 35MM prior to purchasing.
Item #: KRUSBB-G
Condition:
New
Price: $159.99
Sale: $151.99
Save: 5%
Save: $8.00
Description: 2011+ Chevrolet Silverado 2500HD / 3500HD
2011+ GMC Sierra 2500HD / 3500HD
Item #: KRKN11
Condition:
New
Price: $99.99
Sale: $94.99
Save: 5%
Save: $5.00
Description: Fits 2020+ GM 2500/3500HD
~6400LBS Load Leveling Capacity at 150PSI
Confirmed 5th Wheel Hitch Compatibility:
OEM Puck System
GNRK1020
Item #: 88-33200
Condition:
New
Price: $899.95
NEW!
Engine Oil Filter
Description: Includes:
-2x PPE GM 6.6L Duramax MicroPure XR® Engine Oil Filter (114000750)
- PPE GM 6.6L Duramax Fuel Coolant Pump Relocation Kit (114002700)
Item #: 114000750 x2 & 114002700
Condition:
New
Limited Supply: Only 0 Left!
Price: $100.00
Description: Will not fit AT4X and ZR2 models
Front Lift Height: 5"
Rear Lift Height: 4.5"
2 Piece Driveshafts Require P/N ZONC5612
Item #: ZONC43F
Condition:
New
Free Ground Shipping
Price: $2,071.50
Description: For Carrier Bearing Drop Mounted Below Cross-Member.
For Two-Piece Driveshafts common on CCLB Models when doing a lift kit.
Item #: ZONC5612
Condition:
New
Price: $50.95
Items 1-20 of 20