Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Sounds like you are looking at the battery current sensor?
It is a black ring around a cable?
This may help as well.
Could do, since the BCM monitors battery usage, and it would have codes set now.
Can't say I have ever tried to start one with the current sensor disconnected.
It is fitted to many cars now.
Can we get a scan done as well now?
Do you need any further help?
I hope my advice has been of assistance to you.