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Dorman - Diesel Exhaust Fluid Heater - 904-394

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$185.61
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SKU: 591|904-394

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Dorman - Diesel Exhaust Fluid Heater - 904-394
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Diesel Exhaust Fluid Heater

Product Description

The factory DEF heater on certain vehicles often fails from fluid intrusion. This Dorman OE FIX solution modifies the OEM design to address this failure point and increase reliability.

  • Upgraded replacement - this diesel exhaust fluid (DEF) heater features additional protection from fluid intrusion
  • Restores performance - designed to match the fit and function of the original equipment part
  • Thoroughly tested - each design undergoes cyclical heater element fatigue testing
  • Trustworthy quality - backed by team of engineers in the United States

Product Specifications

Electrical Connector Gender: Male Female
Electrical Connector Quantity: 2
Electrical Connector Terminal Gender: Male Female
Electrical Connector Terminal Quantity: 2; 6
Height: 191 mm
Hose Included: No
Housing Color: Black
Housing Material: Plastic
Inlet Fitting Type: Female
Inside Diameter: 115 mm
Level Sensor Type: Resistor
Mounting Hardware Included: Yes
Outlet Fitting Type: Female
Package Contents: 1 Diesel Exhaust Fluid (DEF) Heater
Package Quantity: 1
Packaging Type: Box
Selling Package Quantity UOM: Piece
Universal Or Specific Fit: Specific
Wire Color: Black; White; Yellow; Blue; Red; Gray
Wire Insulation Material: Plastic

OE Numbers

22872118 GENERAL MOTORS
22902620 GENERAL MOTORS
23379348 GENERAL MOTORS
84412924 GENERAL MOTORS

Fitment

Year Make Model Configuration Positions Application Notes
2012-2016 Chevrolet Silverado 2500 HD V8 403 6.6L (6599cc); DIESEL
2012-2016 Chevrolet Silverado 3500 HD V8 403 6.6L (6599cc); DIESEL
2012-2016 GMC Sierra 2500 HD V8 403 6.6L (6599cc); DIESEL
2012-2016 GMC Sierra 3500 HD V8 403 6.6L (6599cc); DIESEL

Buy with confidence – If you encounter any issues with your Dorman product, simply reach out to us. We are committed to ensuring your satisfaction and will assist with any return or exchange requests that meet our policy guidelines.

Why Choose Dorman?

Dorman is a trusted leader in OE-style replacement parts, offering precision-engineered solutions for reliable performance. Each part undergoes rigorous testing to ensure durability, safety, and a seamless fit. Designed as a cost-effective alternative to OEM parts, Dorman provides high-quality replacements backed by expert engineering. Choose Dorman for dependable, long-lasting automotive solutions.

We assure you that we ship all the parcels received on the same day till 12 pm standard central time.

  • Usually, it takes 1 to 5 days for the package to reach.
  • Our standard shipping is FedEx home delivery or UPS Ground. Delivery for residential locations is estimated to be on Saturdays ( this applies to 48 continental states).
  • Delivery for residential locations is estimated to be on Saturdays ( this applies to 48 continental states).
  • The email address on the order will send you all the shipment tracking details.
  • Please note that we are not responsible for any delays because of holidays, weather, or anything beyond our control.

We send shipment tracking numbers via email. It is sent to the email address you provided in your order. If you would like to change the email address you provided, Feel free to contact our support team at (support@part-synergy.com).

Return Shipping

We are here to serve you. If there is any item that is damaged or needs to be exchanged or returned for any reason, please contact our support team(support@part-synergy.com). Please read our return and exchange policy to learn more about this.

All orders are free of shipment costs. The cost mentioned on the website is for getting it to your doorstep.

Please do get in touch with our customer support as they may be able to provide you with a return label which will cost you much less. But if you still need to send an item back, here is our shipping address. 

USA MAP For Shipping
1 Day 2 Days 3 Days 4 Days 5 Days 6 Days 7+ Days
If Picked Up On Will be delivered by
Monday Tue Wed Thu Fri Mon@ Tue@ Wed=
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Wednesday Thu Fri Sat Tue Wed@ Thu@ Fri=
Thursday Fri Sat Sun^ Wed Thu@ Fri@ Mon=
Friday Sat Sun^ Mon Thu Fri@ Mon@ Tue=
Saturday Tue* Wed Thu Fri Mon@ Tue@ Wed=
Sunday Tue** Wed Thu Fri Mon@ Tue@ Wed=

*Sunday^ delivery if the shipper is enrolled in weekend spotted trailer pickups

**Monday delivery if the shipper is enrolled in weekend spotted trailer pickups

^Monday if not a Sunday eligible ZIP code

@ The following week

= Earliest possible delivery the following week

This map illustrates service schedules in business days as of April 2022 for FedEx Home Delivery shipments

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The Service Maps and charts are a general representations of transit. For more accurate transit quotes visit Shipping Rates and Delivery Times on fedex.com

Please Note: Packages picked up from a residence may have one additional transit day. For faster returns please drop off at a staffed FedEx location.