Dorman 904-387 diesel exhaust fluid (def) heater for the 2012-2016 Chevrolet Express 2500 V8 6.6L and other vehicles heats the diesel exhaust fluid. The factory heater on certain vehicles often fails from fluid intrusion, and this Dorman OE FIX design modifies the original to address that failure point and increase reliability.
- Dorman OE FIX redesign aimed at the fluid-intrusion failure of the factory heater
- Additional protection from fluid intrusion
- Each design goes through cyclical heater element fatigue testing
- Plastic housing with a male inlet fitting and a female outlet fitting
- Includes a coupler and mounting hardware
Quick facts
- Part: Dorman 904-387 diesel exhaust fluid (def) heater
- Fits: 2012-2016 Chevrolet Express 2500 V8 6.6L and other vehicles
- Material: Plastic
- Condition: New
A DEF warning light or fluid that no longer thaws in cold weather can mean the heater has failed. Other parts of the DEF system may produce similar signs, so with the engine off, look over the electrical connectors and wiring for damage, corrosion or moisture first; a shop can test the heater itself.
Fits
This heater is built for the 2012-2016 Chevrolet Express 2500 V8 6.6L, the 2012-2016 Chevrolet Express 3500 V8 6.6L and the 2012-2016 Chevrolet Express 4500 V8 6.6L, among other vehicles. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Quantity per vehicle: 1
- Inside diameter: 115 mm
- Height: 241 mm
- Inlet fitting: male
- Outlet fitting: female
- Electrical connectors: 2
Build and materials
- Housing material: plastic
- Condition: new
- Mounting hardware: included
- Country of origin: China
In the box
One DEF heater and one coupler, with mounting hardware included. A hose is not included. This listing holds one heater, and each vehicle takes one.
Interchange: 5D-1004L
DFH1007 · F01C600294 · F01C600338 · 22905128 · 23379347 · 84412925 · DFH107
This part cross-references / interchanges with the following part numbers:
DFH1007, F01C600294, F01C600338, 5D-1004L, 22905128, 23379347, 84412925, DFH107
Frequently Asked Questions
Does the Dorman 904-387 fit the 2012-2016 Chevrolet Express 3500 V8 6.6L?
Yes. Dorman 904-387 fits the 2012-2016 Chevrolet Express 3500 V8 6.6L. For another model, open the "Vehicles it fits" section and check your own year and engine.
Does the Dorman DEF heater come with a hose?
No. Dorman 904-387 is one heater with a coupler and mounting hardware; a hose is not included.
What fittings does this DEF heater have?
The inlet fitting is male and the outlet fitting is female. The housing is plastic and the inside diameter is 115 mm.
Why was this DEF heater redesigned?
The factory heater on certain vehicles often fails from fluid intrusion. This version adds protection against it, and each design undergoes cyclical heater element fatigue testing.
Does Dorman 904-387 replace the heater numbered F01C600294?
Yes. F01C600294 is one of the numbers on the Interchange line for this heater, along with 22905128 and 84412925.
