Product Description
Wehrli WCF100269 FASS Fuel System Relocation Bracket – 11–16 LML Duramax Crew Cab
The WEHRLI CUSTOM FAB WCF100269 FASS FUEL SYSTEM RELOCATION BRACKET is designed specifically for 2011–2016 LML Duramax crew cab trucks running a FASS lift pump. This precision laser-cut mount moves the FASS system to a protected location underneath the truck, just in front of the fuel tank on the driver-side frame rail, giving you a cleaner, safer and more serviceable fuel system layout.
Key Features
- Engineered for 2011–2016 LML 6.6L Duramax crew cab 2500/3500 trucks.
- Relocates the FASS fuel system under the truck just ahead of the fuel tank on the driver-side frame rail.
- Moves the lift pump out of the debris and road spray path from the rear tires for better protection.
- Stealthy, tucked-up mounting position for improved ground clearance and a cleaner look.
- Durable zinc primer with semi-gloss black powder coat for long-term corrosion resistance.
- High-strength mounting hardware included for a solid, rattle-free installation.
- Compatible with common FASS Titanium and Titanium Signature Series systems for LML Duramax (verify part numbers with FASS).
Vehicle Fitment
Engine: 6.6L LML Duramax (Turbo Diesel)
- 2011–2016 Chevrolet Silverado 2500HD 6.6L Duramax – Crew Cab only
- 2011–2016 Chevrolet Silverado 3500HD 6.6L Duramax – Crew Cab only
- 2011–2016 GMC Sierra 2500HD 6.6L Duramax – Crew Cab only
- 2011–2016 GMC Sierra 3500HD 6.6L Duramax – Crew Cab only
Important: This bracket is not compatible with regular cab, extended cab, or cab & chassis configurations. It is designed around the OEM LML frame, tank and wheelbase used on crew cab pickups.
What’s Included
- Wehrli Custom Fab WCF100269 FASS fuel system relocation mounting bracket
- Mounting hardware (as supplied by Wehrli Custom Fab)
- Installation instructions from Wehrli / FASS (check your FASS kit documentation)
Why Relocate Your FASS Fuel System?
Many Duramax installs place the FASS pump near the rear of the frame or on a bed crossmember where it’s exposed to rocks, salt, and road grime. The WCF100269 bracket moves the system forward along the frame rail, inboard of the frame and ahead of the rear tire spray zone. This:
- Reduces exposure to debris, ice, and road salt that can damage wiring, fittings, and filters.
- Shortens and cleans up fuel line routing for a more professional installation.
- Helps minimize pump noise in the cab by isolating it on the frame near the tank.
- Makes filter service more convenient compared to awkward, low-hanging mounts.
Installation Notes
- Bracket is designed to mount on the driver-side frame rail just ahead of the fuel tank.
- Intended for use with FASS LML-specific systems. Verify your FASS part number and routing before mounting.
- On most applications, installation is bolt-on using existing frame features; minor drilling or trimming may be required depending on other aftermarket equipment.
- Always mock up the pump and filter head on the bracket before tightening hardware to confirm line routing and clearance.
- After installation, cycle the FASS system and check for leaks, line chafe, and frame/tire clearance throughout suspension travel.
Recommended Related Parts
- Earlier trucks: WEHRLI CUSTOM FAB WCF100265 FASS Fuel System Relocation Bracket for 01–10 Chevrolet 6.6L Duramax (Crew Cab Only)
- Newer L5P trucks: WEHRLI CUSTOM FAB WCF100276 17–21 Chevrolet L5P Duramax Relocation Mount FASS Lift Pump
- FASS lift pumps and filters: FASS Fuel Systems & Parts for GM Duramax
Specifications – WEHRLI WCF100269
| Attribute | Value |
|---|---|
| Brand | Wehrli Custom Fab (WCFab) |
| Manufacturer Part # | WCF100269 |
| Application | 2011–2016 Chevrolet / GMC 2500HD & 3500HD 6.6L LML Duramax – Crew Cab only |
| Pump Compatibility | Designed for FASS Duramax systems (Titanium / Titanium Signature Series LML kits – confirm with FASS) |
| Mounting Location | Driver-side frame rail, underneath truck just in front of the fuel tank |
| Construction | Precision laser-cut steel bracket |
| Finish | Zinc primer with semi-gloss black powder coat |
| Hardware | High-strength mounting hardware included (per Wehrli kit contents) |
| Truck Configurations | Crew Cab short- & long-bed pickups only; not for regular cab, extended cab, or cab & chassis |
FAQ
Will this bracket fit my regular cab or extended cab 2011–2016 Duramax?No. The WCF100269 bracket is designed specifically around crew cab 2500HD/3500HD frames and fuel tank location. It is not recommended for regular cab, extended cab, or cab & chassis trucks.
Does this kit include the FASS lift pump and filters?
No. This listing is for the Wehrli relocation bracket and mounting hardware only. You must supply a compatible FASS lift pump system for your 2011–2016 LML Duramax.
Do I need to drill the frame to install this bracket?
In most cases, the bracket uses existing frame features for a near bolt-on install. However, depending on other aftermarket equipment or previous modifications, some minor drilling or trimming may be required. Always follow the instructions provided with your bracket and FASS system.
Will this work with other lift pumps like AirDog?
The WCF100269 is engineered around FASS LML Duramax systems. Some installers adapt other brands, but that may require custom drilling, spacers, or line routing. For the cleanest, most straightforward install, pair this bracket with a FASS system designed for the 2011–2016 LML Duramax.
Is any tuning or calibration required after installing this bracket?
Relocating the FASS system with this bracket does not change ECM calibration. No tuning is required solely for the bracket itself. Just verify that your lift pump is wired, fused, and plumbed per FASS specifications, and confirm fuel pressure at the rail with a gauge or monitor.
