This is a specialised 5-byte seed-key calculation tool developed by DiagCode, designed to generate security access keys from seed values used in GM vehicle control units.

Vehicle control modules operate using a seed-key security mechanism, where a correct key must be calculated from a given seed value in order to enable authorised access to specific functions. This tool applies proprietary algorithms to calculate the corresponding key required for such access.

By providing accurate seed-to-key calculations, the tool supports professional use of diagnostic systems such as DPS and SPS when working with compatible GM vehicle platforms.

This tool performs seed-to-key calculations only and does not provide direct diagnostic, programming, or security bypass functionality.

      This is a software activation. All current: 

 Hyundai and KIA VIN to PIN calculator customers

 Simplediag any software activation customers

 SKGT customers

       can enable this function because they already have a security dongle. 

New customers who wish to purchase it and do not have a security dongle must purchase one along with the activation.