2002 Camero Z28, LS1: Check engine light goes on: Scanner shows no code:

I think it was a code reader. I had it done at a mechanic shop the first time and at autozone the second time.

Next time light comes on, have it tested before clearing any codes! Record code(s) post results and we will help.

Both times I had it tested and the scanners showed no code.

AGREED!!