Racor
Racor | Water In Fuel Sensor (WIF) | 2001-2010 GM / Chevrolet 6.6L Duramax - LB7, LLY, LBZ, LMM | RK42043
- SKU:
- RCRK42043
- MPN:
- RK42043
- Weight:
- 1.00 LBS
Description
Racor Water-In-Fuel Sensor | RK42043 | GM/Chevrolet Duramax 6.6L LB7, LLY, LBZ, LMM (2001–2010)
Protect Your Diesel System from Water Contamination
The Racor RK42043 Water-In-Fuel (WIF) Sensor is a direct-fit replacement for 2001–2010 GM/Chevrolet 6.6L Duramax diesel engines, including LB7, LLY, LBZ, and LMM variants. This sensor detects water in the fuel system, helping prevent injector damage, poor performance, and costly repairs.
Key Features:
- OE Quality Sensor – Designed to meet or exceed factory specifications.
- Reliable Water Detection – Alerts to water presence in the fuel filter.
- Durable Construction – Built to withstand harsh diesel environments.
- Plug-and-Play Installation – Easy replacement with factory-style connector.
Compatible Applications:
- GM/Chevrolet Silverado & Sierra HD (2001–2010)
- Vehicles equipped with 6.6L Duramax LB7, LLY, LBZ, LMM engines

Using and/or handling these products may expose you to chemicals that include toluene and/or benzene, which are known by the State of California to cause cancer, birth defects and/or other reproductive harm. Learn More at p65warnings.ca.gov
PLEASE VERIFY FITMENT
Applications are provided as reference only. Please verify fitment by cross-referencing your original part number with the numbers provided on this page.
RETURNING USED CORES
Most remanufactured parts require a core charge. If you are puchasing an item from Diesel Advantage that does require a core charge, you will be eligible for core credit upon return of your old core unit. Please note that used cores must be returned within 30 days, provided the replacement parts were purchased at Diesel Advantage. All cores must be shipped back in the box you received your new/reman product in. If your original box arrives damaged, please contact us for further instructions.
Before returning your core, be sure to drain fluids from the core and place it in a plastic bag to prevent leakage. Then pack it in the box that contained the new/reman part you purchased from Diesel Advantage.
Cores that are incomplete, missing components, are burnt or tampered with, are damaged or have damaged components, or are disassembled, will not be accepted.
Customers are responsible for making sure cores are returned within the mentioned timeframe, and return shipping costs. If you have any questions or concerns, please contact us at 877-638-6300.