A little background. Went to store came out and car would not start. got lights and radio and dash lights, when the key is turned to start everything goes dead. Tried a new Battery, pulled the starter took it to Oreilys to be tested and it passed. Connections are all clean and tight. Even tried the 10min drill for the theft. Could the BCM be bad?

 

I had the same issue, it was the starter. I took the car to a Chevy dealership and they confirmed the starter was bad, even though it worked fine on the test rack at Murray's/O'Reily's.

As a test, try hitting / tapping the starter a few times with a hammer while having the key turned to the start position. If the starter is bad, it still may fire up when hit.

 

Connected a hot wire to the battery from starter and it cranked the engine. Starter probably good swapped starter relay didn't help, ignition switch or neutral safety switch?