Gm 5 Byte Seed Key !!top!! -

The tool sends the calculated key back to the ECU. If it matches what the ECU calculated internally, security access is granted. Why 5 Bytes?

Low voltage can cause the ECU to generate unstable seeds or fail the verification process. Always use a battery maintainer when performing these operations. Conclusion gm 5 byte seed key

The Security Access transaction typically follows this sequence: The tool sends the calculated key back to the ECU