Fitment

GM diesel vehicles with SCR AdBlue Euro 5 Euro 6 emission system including

• Chevrolet Colorado 2.8L Duramax diesel (2015–2019)
• Chevrolet Express 2500 2.8L diesel
• Chevrolet Express 3500 2.8L diesel
• GMC Canyon 2.8L Duramax diesel
• GMC Savana 2500 2.8L diesel
• GMC Savana 3500 2.8L diesel
• Selected GM light commercial diesel SCR applications

OE reference
55502673
SNS391C
A2C16161900-01
24001920 (replacement updated part number)

FAQ

What is this NOx sensor used for

It measures nitrogen oxide levels in diesel exhaust gas and sends data to ECU for SCR AdBlue emission control system

Is this inlet or outlet sensor

It is commonly used as SCR downstream NOx sensor depending on vehicle exhaust configuration

Are 55502673 and 24001920 interchangeable

Yes, 24001920 is the updated replacement for 55502673 in many applications

What system does it work with

SCR Selective Catalytic Reduction system using AdBlue injection for diesel emission compliance

What are common failure symptoms

Engine warning light SCR AdBlue fault reduced power limp mode NOx sensor communication error emission efficiency faults