- Home »
- Catalog
UnderDog Diesel » 2015, Sierra 3500
Products for:
- Year: 2015
- Model: Sierra 3500
View Universal items for: 2015 Sierra 3500
Browse Products
Fuel Tank
Description: Important Note about the Fuel Gauge Operation:
The distance to empty (DTE) on GM trucks can’t be reprogrammed, so it will show about half the mileage that is really left. You can multiple the...More Details »
Item #: 10-1017
Condition:
New
Price: $1,249.00
Description: 50 State Compliant, for use on Stock Trucks w/ Emissions Equipped.
Item #: LML-CP3-CARB
Condition:
New
CARB: (EO #D-756)
Price: $2,600.00
Description: For use on an already *modified* truck, where a tune revision/new tuning, is not an option.
Item #: LML-CP3-NOTUNINGREQ'D
Condition:
New
This product cannot ship to California.
Price: $2,175.00
This product cannot ship to California.
Price: $1,780.00
Price: $800.00
Item #: LML-100SAC
Condition:
New
This product cannot ship to California.
Price: $4,336.80
Item #: LML-150SAC
Condition:
New
This product cannot ship to California.
Price: $5,023.20
Item #: LML-200SAC
Condition:
New
This product cannot ship to California.
Price: $6,063.20
Item #: LML-250SAC
Condition:
New
This product cannot ship to California.
Price: $6,479.20
Item #: LML-30SAC
Condition:
New
This product cannot ship to California.
Price: $3,868.80
Item #: LML-300SAC
Condition:
New
This product cannot ship to California.
Price: $6,583.20
Item #: LML-45SAC
Condition:
New
This product cannot ship to California.
Price: $3,983.20
Item #: LML-60SAC
Condition:
New
This product cannot ship to California.
Price: $4,066.40
Item #: LML-80SAC
Condition:
New
This product cannot ship to California.
Price: $4,336.80
Item #: LML-10SAC
Condition:
New
This product cannot ship to California.
Price: $2,610.40
Fuel Tank
Description: Extra Large Midship Tank 57 Gallon
Item #: 7010211
Condition:
New
Price: $1,481.05
Fuel Tank
Description: Spare Tire Auxiliary Fuel System
Item #: 4010211
Condition:
New
Price: $2,032.05
Spare Tire Carrier Mount
Description: Spare Tire Buddy In Bed Tire Mount
Item #: 9901330
Condition:
New
Price: $94.05
Fuel Tank
Description: Travel Trekker Auxiliary Diesel Fuel System In Bed 40 Gallon
Item #: 5410040
Condition:
New
Price: $1,329.05
Fuel Tank
Description: Travel Trekker Auxiliary Diesel Fuel System In Bed 50 Gallon
Item #: 5410050
Condition:
New
Price: $1,357.55
Item #: UDD112
Condition:
New
Price: $23.99
NEW!
Description: For Modified Trucks Only, will not work on truck with emissions.
Off-Road Use Only
Item #: UDD-LML-9thInj-SK
Condition:
New
Price: $29.99
NEW!
Description: Downpipe Removal Required for Install, Recommend replacing with a Quality Aftermarket, such as PPE, WCFAB, MBRP.
Item #: UDD-LML-Coolant-Bypass
Condition:
New
Price: $104.95
EPC Fooler
Description: -Increased Line Pressure
-Increased Clamping Force to Clutch Packs
-Increased Ability to hold more HP
-Enhances Transmission Performance
-Easy Install
Item #: UDD-EPC-FOOLER
Condition:
New
Price: $44.99
Description: 3 CP3 Kit Options! Be sure to select the one best suited to your trucks modifications.
UnderDog Diesel CP3 Kit w/ SuperSport - for Modified Trucks, TUNING REQ'D
S&S Diesel CP3 Conversion w/...More Details »
Item #: UDD-LML-FSCK-CP3
Condition:
New
Price: $4,659.00
Description: For use on applications up to 800HP
Item #: UDD-CP3CK-10
Condition:
New
This product cannot ship to California.
Price: $2,590.00
Description: For use on applications up to 1000HP.
Item #: UDD-CP3CK-12
Condition:
New
This product cannot ship to California.
Price: $3,120.00
Description: For use on Extreme Applications, up to 1200HP.
Item #: UDD-CP3CK-14
Condition:
New
This product cannot ship to California.
Price: $3,399.00
Description: For use on modified stock to 650HP applications.
Item #: UDD-CP3CK-SS
Condition:
New
This product cannot ship to California.
Price: $1,699.00
UnderDog Diesel/S&S Diesel Motorsport CP4 Contamination Kit - 2011-2016 LML Duramax - Builder Series
Description: Build Back Better with our UnderDog Diesel/S&S Diesel Motorsport CP4 Contamination Builder Series Kit!
Choose your size of S&S Diesel Motorsport Injectors & CP3 to chase that HP Goal after a CP4 Failure, all in one convenient kit!
Item #: UDD-S&S-LML-FSCK-BUILDER
Condition:
New
Lead Time on Injectors & Large Pumps - Roughly 1 Week
Price: $900.00
Description: Brand New - No Core Charge
Item #: ZSG7675
Condition:
New
Price: $509.99
Description: Replaces failure prone plastic factory GM Heater Core Firewall Coolant Fitting
Billet direct-fit replacement with 5/8" barb connection
More resistant to heat and vibration
Double O-ring...More Details »
Item #: WCF100155
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $41.00
Sale: $39.77
Save: 3%
Save: $1.23
Description: - CNC Machined Billet Cap is a direct OEM Replacement not a cover
- Includes new diaphragm seal
- Made in USA
- Black Anodized Finish
- Installs in seconds
Item #: WCF100216
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $44.00
Sale: $42.68
Save: 3%
Save: $1.32
Description: - CNC Machined Billet Cap is a direct OEM Replacement not a cover
- Includes new diaphragm seal
- Made in USA
- Clear Anodized Finish
- Installs in seconds
Item #: WCF100215
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $44.00
Sale: $42.68
Save: 3%
Save: $1.32
Description: Fully TIG Welded, CNC machined billet steel exhaust manifolds
Finished in Black Ceramic Coat rated for 1800ºF
Includes new gaskets for manifold to cylinder head and manifold to up pipe...More Details »
Item #: WCF100363
Condition:
New
In Stock. Ships in 3-5 business days.
This product cannot ship to California.
Price: $1,399.00
Sale: $1,357.03
Save: 3%
Save: $41.97
Description: ARP Up Pipe Bolt kit for 2001-2016 Duramax. 6 Washers and Bolts for installing 1 up pipe. Includes ARP Lube.
Purchase two sets when installing a pair of up pipes.
Item #: WCF100240
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $37.00
Sale: $35.89
Save: 3%
Save: $1.11
Description: Driver Side 2" Stainless Up Pipe
Up Pipe Gaskets (2)
Item #: WCF100652
Condition:
New
In Stock. Ships in 3-5 business days.
This product cannot ship to California.
Price: $335.00
Sale: $324.95
Save: 3%
Save: $10.05
Description: - Up pipe to Turbo gasket
- Up pipe to Manifold gasket
Item #: WCF100364
Condition:
New
Price: $19.95
Sale: $19.35
Save: 3%
Save: $0.60
Description: TIG Welded Fabricated Aluminum Cover for Plastic Reservoir
Utilizes OEM Mounting Points and Hardware
Installs in minutes with basic hand tools
Custom Powder Coat Finish
Item #: WCF100205
Condition:
New
WCFab Red, Bengal Blue, Bengal Red, Gloss Black, and Gloss White in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $145.00
Sale: $140.65
Save: 3%
Save: $4.35
Description: -CNC Machined Billet Aluminum GM factory oil cap filler neck replacement
-Matches WCFab Billet Aluminum Coolant Tank and Brake Reservoir Caps
-Includes o-ring seal
-Machined cam lock
-Black...More Details »
Item #: WCF100443
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $51.00
Sale: $49.47
Save: 3%
Save: $1.53
Description: -CNC Machined Billet Aluminum GM factory oil cap filler neck replacement
-Matches WCFab Billet Aluminum Coolant Tank and Brake Reservoir Caps
-Includes o-ring seal
-Machined cam lock
-Clear...More Details »
Item #: WCF100442
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $51.00
Sale: $49.47
Save: 3%
Save: $1.53
Item #: WCF100733
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $155.00
Sale: $150.35
Save: 3%
Save: $4.65
Wehrli Custom Fabrication 2011-2016 Duramax / 2013-2018 Cummins Low Coolant Level Sensor - WCF206-25
Description: #NAME?
Item #: WCF206-25
Condition:
New
In Stock. Ships in 3-5 business days.
Price: $49.00
Sale: $47.53
Save: 3%
Save: $1.47
Description: - Heavy Duty 2" Passenger Side Up Pipe
- Fully TIG Welded 11 GA Stainless Steel Construction
- Ductile Iron Cast EGR Connection w/ EGT Sensor Port
- Compatible with OEM & WCFab Turbo Down Pipes...More Details »
Item #: WCF100211
Condition:
New
In Stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $419.00
Sale: $406.43
Save: 3%
Save: $12.57
Description: - Fully TIG Welded 11 GA Stainless Steel Construction
- Heavy Duty 2" Driver Side Up Pipe
- Heavy Duty 2" Passenger Side Up Pipe
- Ductile Iron Cast EGR Connection w/ EGT Sensor Port
-...More Details »
Item #: WCF100197
Condition:
New
In Stock. Ships in 3-5 business days.
This Product cannot ship to the state of California
Price: $695.00
Sale: $674.15
Save: 3%
Save: $20.85
Description: 23% Gain in Air Flow Over Stock
3.5 in. Cold Side Intercooler Pipe
14g aluminum construction
Incorporated threaded bung to reinstall OEM Intake Temperature Sensor
Silicone Boots...More Details »
Item #: WCF100682
Condition:
New
WCFab Red, WCFab Grey and Gloss Black in stock and ships in 3-5 business days. 10-15
business day lead time on
other colors.
This product cannot ship to California.
Price: $335.00
Sale: $324.95
Save: 3%
Save: $10.05
Description: 37% Improvement in Air Flow Over Stock
4" Intake Pipe
Air Box & Lid Constructed of 10G Aluminum Sheet
Dry Air Filter
Outerwear's Pre-Filter Cover
Includes Installation Hardware...More Details »
Item #: WCF100194
Condition:
New
WCFab Red, WCFab Grey, Candy Teal, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This product cannot ship to California.
Price: $549.00
Sale: $532.53
Save: 3%
Save: $16.47
Description: - 37% Improvement in Air Flow Over Stock Intake
- 5.6% Improvement in Air Flow Over Stock Intake Horn
- 4" Intake Pipe
- Air Box & Lid Constructed of 10G Aluminum Sheet
- Dry Air Filter
-...More Details »
Item #: WCF100304
Condition:
New
WCFab Red, WCFab Grey, Gloss Black, and Gloss White in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This product Cannot Ship to the State of California
Price: $839.00
Sale: $813.83
Save: 3%
Save: $25.17
Description: - Black Anodized, CNC Machined Billet CP3 Pump Mounting Plate
- Precision Formed, Pre-Bent CP3 Feed lines for use With or Without OEM Fuel Filter Housing
- CNC Machined Stainless Steel High Flow...More Details »
Item #: WCF100260
Condition:
New
In Stock. Ships in 3-5 business days.
This product Cannot Ship to the State of California
Price: $775.00
Sale: $751.75
Save: 3%
Save: $23.25
Description: 3 in. Hot Side Intercooler Pipe
14g Mandrel Bent Aluminum Construction
Silicone Boot
T-Bolt Clamps
Powder Coating
No tuning required
Item #: WCF100353
Condition:
New
WCFab Red, WCFab Grey, Gloss White and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This product cannot ship to California.
Price: $305.00
Sale: $295.85
Save: 3%
Save: $9.15
Description: - Left & Right Mount
- High Grade Hardware for Mount to Engine
- Thread-locker compound
- Poly Bushings
- Powder Coating
Item #: WCF100160
Condition:
New
Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $479.00
Sale: $464.63
Save: 3%
Save: $14.37
Description: - 4.8 in. Inlet, Largest Intake Horn on the Market
- CNC Machined Cast Aluminum Construction
- Includes PCV Port
- Eliminates Resonator Connection
- Silicone Reducer Boot
- Stainless Steel...More Details »
Item #: WCF100417
Condition:
New
WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This Product Cannot Ship to the State of California
Price: $399.00
Sale: $387.03
Save: 3%
Save: $11.97
Description: 18% Gain in Air Flow Over Stock
3 in. High Flow Upper Intercooler Cross Over Pipe
14g aluminum construction
Compatible with OEM Y-Bridge
Includes Billet Turbo Resonator Plate for OEM...More Details »
Item #: WCF100328
Condition:
New
WCFab Red with Standard Brushed Tag, WCFab Grey with Standard Brushed Tag and Gloss Black with Standard Brushed Tag in stock and ships in 3-5 business days. 10-15
business day lead time on other colors.
This product cannot ship to California.
Price: $419.00
Sale: $406.43
Save: 3%
Save: $12.57
Description: - 3 in. High Flow Upper Intercooler Cross Over Pipe (18% Gain in Air Flow Over Stock)
- 3.5 in. Passenger (Cold) Side Intercooler Pipe (23% Gain in Air Flow Over Stock)
- 3 in. Driver (Hot) Side...More Details »
Item #: WCF100409
Condition:
New
WCFab Red, WCFab Grey, Gloss White, and Gloss Black in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
This Product Cannot Ship to the State of California
Price: $1,039.00
Sale: $1,007.83
Save: 3%
Save: $31.17
Description: - Made from cast A356.0-T6 aluminum
- Includes fasteners, pan, NPT plug, and billet stainless steel Neodymium magnet drain plug
- Finished in your choice of custom powder colors
- Provides 1...More Details »
Item #: WCF100132
Condition:
New
10-15 Business Day Lead Time
Price: $409.00
Sale: $396.73
Save: 3%
Save: $12.27
Description: 3" Down Pipe
High Temp Black Ceramic Coating
Heat Wrap
Item #: WCF100121
Condition:
New
In Stock. Ships in 3-5 business days.
This product cannot ship to California.
Price: $229.00
Sale: $222.13
Save: 3%
Save: $6.87
Description: 3" Stainless Downpipe (v-band flange)
Heat Wrap
No Tuning Required
Item #: WCF100704
Condition:
New
In Stock. Ships in 3-5 business days.
This product cannot ship to California.
Price: $259.00
Sale: $251.23
Save: 3%
Save: $7.77
Description: Coolant Tank
Low Coolant Level Sensor
Billet Anodized Cap
Over Flow Hose
Coolant Level Sight Glass
Installation hardware
Powder Coating
Made in USA More Details »
Item #: WCF100647
Condition:
New
WCFab Red with Standard Brushed Tag and Gloss Black with Standard Brushed Tag in stock and ships in 3-5 business days. 10-15 business day lead time on other colors.
Price: $473.00
Sale: $458.81
Save: 3%
Save: $14.19
Description: -Coolant Tank
-Low coolant sensor
-Cap
-Hoses
-Clamps
-Fittings
-Powder Coating
Item #: WCF100644
Condition:
New
10-15 Business Day Lead Time
Price: $365.00
Sale: $354.05
Save: 3%
Save: $10.95