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 904-632 Features:

• Fits 2010-2011 Chevrolet Silverado 2500 HD; 2010-2011 Chevrolet Silverado 3500 HD; 2010-2011 GMC Sierra 2500 HD; 2010-2011 GMC Sierra 3500 HD
• 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