there is no radio code it is all vin based over the can with the vin being stored in a eeprom chip in the modules.
Yes I know, I was replying to Big Red post which is why I quoted him.
the info cards have the security number and the key code
the security number is used for programming modules like the immobilizer, cluster, mylink etc and the idea behind it is to prevent unauthorized programming of the modules but the flaw is you can read that number from the eeprom in the bcm, cluster etc because it is stored in plaintext.
Yeah, I also suspected that the security code was used for module programming though I didn't check or reference the service manual specifically. Again it was to correct Big Red’s view that the security code on the card was related to a radio code as used in days gone by.
Interestingly, I suspect the InfoCard is not standardised as shown in the manual, mine certainly isn’t... It contains required codes but makes a silly reference to radio code... I do wish it had tne RPO codes for my car as shown within the owner manual example INFOCARD. As I mentioned, GM QC on display
... you do not need to keep power to the vehicle or anything mythical like that you can just change the battery and when you connect the new battery jump in the vehicle and start it for all the modules to sync.
you may need to open and close the windows to reset those modules and the time and date on the mylink will need to be set but everything else is stored in hardware memory.
Agreed as to our VF’s. But each manufacturer and sometimes each model range within a given manufacturer behaves a little different when disconnecting a battery. Each has its own service procedures and it probably overwhelms the service staff when under the pump. So I’d thing it’s prudent to standardise the plugging in of a battery saver in the hope such would limit any service stuff ups when changing battery...
As always it’s LCD thinking and part of the reason for the urban myth
Ok it’s a guess on my part but what can one expect when they read of service staff figuratively smearing faeces on their pride and joy