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GI Service Center » 2025, Sierra 3500HD
Products for:
- Year: 2025
- Model: Sierra 3500HD
View Universal items for: 2025 Sierra 3500HD
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Items 1-14 of 14
L5P 3 1/2" ,Down Pipe ,2017-2025, 2500HD, 3500HD, SILVERADO ,SIERRA, L5P
Description: For Off Road Competition Use Only.
-3 1/2" Down Pipe
-Ceramic Coating
-Heat Wrap and Clamps
-(3) Pre-built Heater Hose Assemblies with quick connect fittings
-Y-Bridge Port Block Off Plate...More Details »
Item #: 100375
Condition:
New
Price: $500.00
Sale: $425.00
Save: 15%
Save: $75.00
2020-2025 GM 6.6L Duramax 10L1000 Heavy-Duty Cast Aluminum Transmission Pan
Description: Features:
Premium A356.0-T6 heat-treated cast aluminum alloy – a high-strength, thermally conductive material
Precision-cast using permanent steel molds for a smooth, consistent finish and...More Details »
Item #: 128051420
Condition:
New
Price: $399.99
2024+ GM L5P ECM E42 UNLOCK SERVICE UNLOCK 2500 HD 3500 HD Silverado Sierra
Description: ECMs with broken “LOCKING” tabs or connectors WILL NOT be accepted for upgrades.
You MUST use OEM ECM. CAN NOT Swap or use a different one.
Item #: ECM-E42-L5P-U
Condition:
New
Price: $999.99
Item #: 8301X1
Condition:
New
Price: $663.00
Sale: $574.82
Save: 13%
Save: $88.18
Allison 10L1000 Improved New GM 10 Speed Valve Body Assembly
Description: Allison 10L1000 Improved New GM 10 Speed Valve Body Assembly
Item #: 100-24044651
Condition:
New
Price: $2,200.00
Cognito 3-Inch Performance Ball Joint Leveling Lift Kit With Fox PS 2.0 IFP Shocks for 20-25 Silverado/Sierra 2500/3500 2WD/4WD
Description: Kit fits all 2020+ GM HD Trucks 2500/3500
Yields 3-inches of front lift and 1-inch of rear lift
Improves vehicle appearance and reduces nose-down rake
Maintains adequate droop travel to retain...More Details »
Item #: 110-P0883
Condition:
New
Price: $1,959.68
110-90910
Description: Corrected ball joint angle
Added caster
Maintenance-free ball joints
Item #: COG-110-90910
Condition:
New
Price: $649.95
Computer Chip Programmer
Description: Edge EZ for 2024–2025 GM L5P Duramax adds emissions-safe power, throttle response & towing confidence. Plug-and-play, no-trace, 50-state legal module
Item #: 20202
Condition:
New
Available to Order
Price: $549.95
Computer Chip Programmer
Description: Edge EZ for 2024–2025 GM L5P Duramax adds emissions-safe power, throttle response & towing confidence. Plug-and-play, no-trace, 50-state legal module
Item #: 20202-3
Condition:
New
Available to Order
Price: $999.95
6.6L Duramax Billet Coolant Block Off Plate (2001-2025)
Description: Upgrade your rear engine cover and stop the coolant leaks for good!
Our blocking plate is thicker than the stock plate and has an integral square cut O-ring with no gasket required. OE covers...More Details »
Item #: FPE-DMAX-CBOP
Condition:
New
Available To Order
Price: $55.00
KRYPTONITE STAGE 2 LEVELING KIT 2020 Chevy Silverado/GMC Sierra 2500 HD/3500 HD
Description: KRYPTONITE STAGE 2 LEVELING KIT 2020 Chevy Silverado/GMC Sierra 2500 HD/3500 HD
Item #: KR20STAGE2
Condition:
New
Price: $699.99
Sale: $664.99
Save: 5%
Save: $35.00
2024-2025 L5P DURAMAX STEALTH 64MM DROP IN VGT
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
Designed...More Details »
Item #: DM1QQ1070200000
Condition:
New
Price: $3,100.00
2024-2025 L5P DURAMAX STEALTH 67MM DROP IN VGT
Description: Airflow capable of supporting up to 750HP
Custom Billet compressor wheel
Turbine Wheel and Nozzle Ring Upgrades
Major top end EGT control
Compressor and turbine wheel durability upgrades...More Details »
Item #: DM1QQ1070303000
Condition:
New
Price: $3,500.00
L5P / L5D Stealth STR Turbo (2024- 2025)
Description: Extra airflow to make 80-100rwhp over 'Tune only' L5P
Works with box tuners, custom tuning, or without tuning
Major EGT control improvments compaired to stock
Built to last with more durable...More Details »
Item #: DM1QQ1070103000
Condition:
New
Price: $2,400.00
Items 1-14 of 14