Where is the odometer milage kept

I will be replacing the Speedometer Cluster, Where is the Odometer milage stored in the Head of the spedo or at the engine computer. Next question? will I need to reset anything or do I just plug the new cluster and everthing starts working. later

I believe the mileage is actually stored in the instrument cluster. But dont quote me on that. Its either that or the PCM like you said. Either way if you are replacing the instrument cluster, be sure and record the mileage your car shows at that time, and then record what the new one shows so you can accurately keep track of how many miles are on your car.

I dont think you will need to reset anything, should be able to just plug it in and go.