2004 Saturn Vue ODEMETOR

Ur body control module stores ur mileage then displays it to ur spedo like a monitor on a computer.I have never installed one of those but they just keep u from starting the car as far as know.I would take it in to the dealer sounds like a bad body control module. If thats bad it has to be programed when they replace it. Or u could try asking the guy who installed ur machine and see if he messed something up and will look at it. Good luck on that one most of the time people try going back to where they had something installed get no where then bring it to the dealer to fix or repair what they did wrong or find out it was something else. Let me know what u find.