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.

Diesel Exhaust Fluid Heater 904-387 Features:

• Fits 2012-2016 Chevrolet Express 2500; 2012-2016 Chevrolet Express 3500; 2012-2016 Chevrolet Express 4500; 2012-2016 GMC Savana 2500; 2012-2016 GMC Savana 3500; 2012-2016 GMC Savana 4500
• 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