How do you reset exhaust fluid duramax?

To reset the exhaust fluid system on a Duramax engine, you typically need to use a diagnostic tool or scan tool that can communicate with the vehicle's onboard computer. Connect the tool to the OBD-II port, navigate to the appropriate menu for exhaust fluid or DEF (diesel exhaust fluid) settings, and select the option to reset or clear the warning. Ensure that the DEF tank is filled to avoid future warnings. Always consult the vehicle's service manual for specific instructions related to your model year.