That will be located in chassis make sure you choose the right one its the 5th digit of
the vin for trucks good luck

That's related to exhaust solenoid valve in suspenssion pump it could be a number of
things bad solenoid bad control module not supplying ground to the solenoid or no
voltage getting to the solenoid but regardless you need to follow procedure on that
code from your software ondemand5 alldata etc you got to get one of this softwares in
order to propertly diagnose a vehicle or subscribe to identifix that is a good source of
information and fixes good luck.