Fitment

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

• Chevrolet Silverado 2500HD 6.6L Duramax diesel (2011–2016 LML platform)
• Chevrolet Silverado 3500HD 6.6L Duramax diesel
• GMC Sierra 2500HD 6.6L Duramax diesel
• GMC Sierra 3500HD 6.6L Duramax diesel
• Chevrolet Express 2500 / 3500 6.6L diesel
• GMC Savana 2500 / 3500 6.6L diesel
• Selected GM heavy-duty Duramax SCR systems

OE reference
12662972
5WK96645F
19301329
19302360

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 NOx sensor and may function as upstream or downstream depending on exhaust system configuration

Are 12662972 and 5WK96645F interchangeable

Yes, 5WK96645F is the Continental OEM reference matching GM 12662972

What system does it work with

SCR Selective Catalytic Reduction system using AdBlue injection for Euro 5 and Euro 6 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