Fitment

GM diesel vehicles with SCR AdBlue emission system including

• Chevrolet Silverado 2500HD 6.6L Duramax diesel (2017–2019)
• Chevrolet Silverado 3500HD 6.6L Duramax diesel
• GMC Sierra 2500HD 6.6L Duramax diesel
• GMC Sierra 3500HD 6.6L Duramax diesel
• Chevrolet Silverado 4500 / 5500 / 6500 HD diesel (SCR systems)
• Selected GM Duramax L5P SCR emission platforms (Position 3 sensor applications)

OE reference
12696465
24001900 (replacement updated part number)
12694400 (related variant)

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

What position is this sensor

This is commonly used as NOx Position 3 sensor in SCR aftertreatment system depending on exhaust layout

Are 12696465 and 24001900 interchangeable

Yes, GM part 24001900 is listed as the replacement for 12696465

What system does it work with

SCR Selective Catalytic Reduction system using AdBlue injection for 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