Nice... what to expect, when Ktag told you, that the checksum is not correct...
Flash back the file, which you read initially, the car should start!
Make SPS programming with GM GlobalTIS, then read again the flash with Ktag and post it here...
Be professional, mate!
Or... you can flash my file... but if your Ktag don't make a checksum - the car will not start again.
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