Bought an LBZ with old EFILIVE and getting checksum invalid

[GenuinePerf]

Hey guys,

My LBZ has efilive on it but I don't have any of the original license or hardware used to program it. I attempted pulling the tune in it with my new AutoCal V3 and we are getting a Checksum invalid under engine operation. 1st was error $0527 and now $0536

Is the only way around that to find a factory tune and re-flash and completely lose what is in it now? It won't let me apply the patch and full flash with the pulled program.

Thanks!

[Cougar281]

The $0536 suggests thatctye tune in the ecm is locked to an autocal. Don't think there's a way around that.

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