2004 GP Which computer stores mileage and Date

2004 Gran prix . The Date and mileage is messed up . I need a new computer But not sure which one Is it the
Dash info center trip computer or the ECM-ECU computer Thanks

What do you mean, "messed up"? Can't read the display?Incorrect date and mileage?Is it a jumbled mess?

What do you mean, "messed up"? Can't read the display?Incorrect date and mileage?Is it a jumbled mess? It has incorrect date and Mileage

Since you are having an issue with the dates and trip odometers, I'd say it's an issue with the Driver Information Center.

It would be wise to have the vehicle scanned for BCM codes.