Product Description
Upgrade your 2015–2016 Duramax 6.6L with the FASS TSPC12100G Titanium Signature Series Plus 100GPH fuel system. Engineered to deliver cleaner, air-free fuel, this system improves injector life, cold starts, throttle response, and overall reliability—while operating with FASS Whisper Technology for ultra-quiet performance.
- Flows 100 GPH – supports stock to ~600 HP builds
- 2-micron absolute filtration with built-in water separation
- Air/vapor removal to protect injectors and pump
- ORB fittings, black-anodized 6061 hardware, black fuel line
- Mass Flow Return (MFR) continually “polishes” fuel
- Bolt-on bracketry for clean, fast installation
- Limited lifetime warranty from FASS
Fitment
- 2015–2016 Chevrolet Silverado 2500/3500 HD – 6.6L Duramax (LML)
- 2015–2016 GMC Sierra 2500/3500 HD – 6.6L Duramax (LML)
- Configured for stock–600 HP applications
Installation Instructions
Find the latest installation manuals on the official FASS site here: FASS Installation Manuals.
Cross-Reference / Related FASS Systems (Duramax)
- FASS NDTSPC12100G No-Drop Series Plus (2015–2016, stock–600HP)
- FASS TSPC12165G Titanium Signature Series Plus (2015–2016, 600–1000HP)
- FASS TSPC11100G Titanium Signature Series Plus (2011–2014, stock–600HP)
- FASS TSPC10100G Titanium Signature Series Plus (2001–2010, stock–600HP)
Why CPP Diesel
- Diesel-focused experts with proven tech support
- Fast, free shipping in the lower 48
- Real inventory and accurate fitment guidance
FAQ
Will 100GPH support mild tuning and towing on my LML?
Yes—TSPC12100G is designed for stock to ~600 HP setups and is ideal for daily driving and towing.
Do I still need to prime the factory CP4/CP3 after install?
Follow the FASS priming procedure in the manual. The system’s air/vapor separation helps protect high-pressure components.
How often should I change filters?
FASS recommends filter service intervals around 30,000 miles, but shorten intervals with poor fuel quality or severe use.
Is the pump loud?
FASS Whisper Technology keeps operating noise to a minimum while maintaining flow.
Specifications for Fass TSPC12100G
| Attribute | Value |
|---|---|
| Brand | FASS Diesel Fuel Systems |
| Part Number | TSPC12100G |
| Flow Rate | 100 GPH (stock–600 HP) |
| Vehicle Fitment | 2015–2016 Chevy Silverado / GMC Sierra 2500HD–3500HD, 6.6L Duramax (LML) |
| Package Dimensions (W × H × D) | 14.00" × 11.50" × 18.00" |
| Shipping | Free Shipping (Lower 48) |
| UPC | Not provided by manufacturer |
| GTIN | Not provided by manufacturer |
| Warranty | Limited Lifetime (per FASS) |
| Prop 65 Warning | This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit P65Warnings.ca.gov. |
