Dorman 904-376 Diesel Exhaust Fluid (DEF) Heater

Overview of the Dorman 904-376 Diesel Exhaust Fluid Heater

The Dorman 904-376 Diesel Exhaust Fluid (DEF) Heater is designed specifically for select Chevrolet and GMC models, including the Express 2500, Express 3500, Savana 2500, and Savana 3500. This DEF heater ensures proper fluid temperature management to maintain emission control system efficiency in cold conditions.

• Inside diameter of 115 mm for precise fitment
• Includes two electrical connectors with male and female terminals
• Mounting hardware included for straightforward installation
• Durable black plastic housing measuring 241 mm in height
• Female inlet and outlet fittings for secure hose connections
• Resistor-type level sensor integrated
• Wire insulation made of plastic with multiple wire colors for easy identification

Detailed Product Description

The Dorman 904-376 DEF heater is engineered to maintain the optimal temperature of diesel exhaust fluid in colder climates, preventing freezing and ensuring consistent DEF flow. Its specific fitment for Chevrolet Express 2500, Express 3500, GMC Savana 2500, and Savana 3500 models guarantees compatibility and reliable performance. The heater features a plastic housing in black, designed to withstand under-hood conditions while providing durability. The unit includes two electrical connectors with a combination of male and female terminals, supporting secure electrical connections. The resistor-type level sensor helps monitor fluid levels accurately. With mounting hardware included, installation is simplified, and the female inlet and outlet fittings allow for proper hose attachment without additional modifications.

Common Applications and Issues Addressed

• Prevents DEF freezing in low-temperature environments
• Maintains proper DEF flow to the emission system
• Helps avoid emission control system faults related to DEF temperature
• Reduces risk of engine derate caused by DEF system malfunctions
• Supports compliance with emission regulations by ensuring DEF system functionality

Installation Notes and Tips

• Verify compatibility with Chevrolet Express 2500, Express 3500, GMC Savana 2500, and Savana 3500 before installation
• Use the included mounting hardware for secure and proper placement
• Ensure electrical connectors are properly matched (male to female) to avoid connection issues
• Check that inlet and outlet fittings are securely attached to prevent leaks
• Handle wiring carefully to maintain insulation integrity and prevent shorts

Quality Assurance and Warranty

Dorman manufactures the 904-376 DEF heater to meet OEM standards for fit, form, and function. The plastic housing and electrical components are designed for durability under typical operating conditions. This part comes with mounting hardware to facilitate installation and is backed by Dorman's quality assurance processes. Please refer to Dorman's official warranty policy for specific coverage details.