I know this post is a bit old. I have used TurnePro/PCM Hammer to program the 2002 Silverado 5.3/4L60E PCM in the LS Swap I did in the 73 C10 I have. I'm a member of GearHead EFI Forum. They have a section to look up BIN and XDF files.
https://amzn.to/3cFPw53as it works with both Tech2Win and PCMhammer