kody wrote:
my vin # is 1G1YY24U555109027
show them this.
go to TIS (GMs calibration website) and type in your VIN, and get claids, and you'll see htis page, which does not even list your old calibration, as it was preproduction.
It does show the 2 newer, updates to that old calibration, the highlighted one is what your car should show once it is actually updated.