Spectra EM1206URH Diesel Exhaust Fluid (DEF) Heater

Spectra EM1206URH DEF Heater Overview

The Spectra EM1206URH diesel exhaust fluid heater is a direct-fit emission control component for diesel trucks that rely on accurate DEF temperature and level monitoring. It helps keep DEF from freezing during normal operation while supporting a reliable fluid level reading for the system.

Compatible With 2011-2012 Chevrolet Silverado 2500 HD, 2011-2012 Chevrolet Silverado 3500 HD, 2011-2012 GMC Sierra 2500 HD, and 2011-2012 GMC Sierra 3500 HD.

• Precisely calibrated heater and temperature sensor
• Supports DEF freeze prevention during normal vehicle operation
• Provides fluid level sensing for the DEF tank
• OE-requirement validation by Spectra Premium engineers
• Direct replacement for select GM diesel applications

Detailed Product Description

Built for select Chevrolet Silverado HD and GMC Sierra HD diesel applications, the EM1206URH combines heating and level-sensing functions in one emission system component. When the DEF tank is not properly heated or the level signal is inaccurate, the vehicle can trigger a check engine light and enter reduced-speed operation. This part is engineered to restore those functions with OE-style fitment and calibration. This part cross-references GM OE numbers 22783125 and 22902619 for the same application.

Use the Spectra EM1206URH when servicing a DEF heater issue on 2011-2012 Chevrolet Silverado 2500 HD, 2011-2012 Chevrolet Silverado 3500 HD, 2011-2012 GMC Sierra 2500 HD, or 2011-2012 GMC Sierra 3500 HD diesel models. The part number EM1206URH is also a useful reference when verifying the correct emission control replacement before installation.

Common Problems This Part Addresses

• DEF freezing in cold-weather operation
• Incorrect DEF level readings
• Check engine light related to DEF system faults
• Reduced vehicle speed caused by low DEF warnings
• Failed heater or temperature sensor performance

Installation Notes and Tips

Confirm the original part number and vehicle application before replacement. Inspect the DEF tank, electrical connectors, and related wiring for corrosion, damage, or contamination before installing the new heater assembly. After installation, clear any stored fault codes and verify that the DEF level and temperature readings respond correctly.

Quality Assurance

Spectra Premium validates these diesel exhaust fluid heaters through in-house Canadian engineering review to help ensure OE-level requirements are met for the intended application.