Dorman 904-439 Water in Fuel (WiF) Sensor

Reliable Water In Fuel Sensor for Chevrolet and GMC Trucks

The Dorman 904-439 Water In Fuel (WiF) Sensor is designed to detect the presence of water in the fuel system, helping to protect your engine from damage. Compatible with select Chevrolet and GMC heavy-duty trucks, this sensor ensures accurate monitoring and timely alerts.

• Terminal Type: Blade for secure electrical connection
• Housing Material: Durable plastic construction
• Wiring Harness Included for straightforward installation
• Package Contents: Includes one water in fuel sensor
• No attached lead wires, allowing flexible wiring options

Durable Design and Precise Functionality

The Dorman 904-439 sensor features a plastic housing that resists corrosion and environmental damage, ensuring long-term reliability. Its blade terminal type provides a stable and secure electrical connection, minimizing the risk of signal loss. The included wiring harness simplifies installation, making it easier to integrate with the vehicle’s existing fuel system. This sensor is engineered specifically for heavy-duty Chevrolet and GMC models, including Express 2500, Express 3500, Savana 2500, Savana 3500, Sierra 2500 HD, Sierra 3500 HD, Silverado 2500 HD, and Silverado 3500 HD trucks.

Applications and Problem Resolution

This water in fuel sensor is essential for maintaining fuel system integrity and preventing engine issues caused by water contamination. It is commonly used to address:

• Detection of water contamination in diesel fuel
• Prevention of fuel injector damage
• Reduction of engine misfires related to fuel quality
• Protection against corrosion in fuel system components
• Improved fuel system diagnostics and maintenance

Installation Notes and Tips

Installation of the Dorman 904-439 sensor requires basic automotive electrical knowledge. The included wiring harness facilitates connection to the vehicle’s fuel system. Since the sensor does not have attached lead wires, ensure proper routing and secure connections to avoid signal interference. Always disconnect the battery before installation and verify compatibility with your specific Chevrolet or GMC model.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 904-439 Water In Fuel Sensor undergoes rigorous quality control to ensure consistent operation. This part is backed by Dorman’s limited warranty, offering coverage against defects in materials and workmanship under normal use.