Looking to remove the 70mph electronic speed governor on this vehicle.
Tried doing it through ACDelco helpdesk line and get the VCI#, but they refused to help due to vehicle having a salvage history.

VIN 1GTZ7HFL 00000 2292 (antiSEO measure, replace 00000 with XG126)
Boot Software 12664192
Main Operating System 12660050
Engine 12660054
This is a pretty rare vehicle, and the closest one I was able to find was a 2014, but I don't think it's a good idea to use that file.

Advice, or base tune?