Fellow tuners, I just completed an engine build on a 2012 Camaro SS for a customer. After the build, I pulled the file (car was originally modified, customer over-revved engine and valves kissed the top of the pistons) to make a few modifications to set the ECM for some wideband tuning. During the flash the script exited with $066FF Checksum Failure. Looks like this ECM has had tuner or a file EFI Live didn't like. I searched Tune File Depot for a good stock cal. to flash in and start from scratch but the file I need isn't on there. Would anyone happen to have a good cal. I could use to get me back going? The OS is 12649046 manual car. Any help is appreciated!! Thanks in advance!!