Your BCM is located on the left hand side of the steering column.
If you want to replace the BCM, you will have to have the new BCM programmed at a chevy dealer. You can't do it yourself. Once it is programmed though it's only a matter of swapping the BCM.
However, before you spend money on that, make sure your problem is not elsewhere.
Does your car crank or is it silent when you turn the key?
Is your security light on?
If your car cranks, have you checked for sparks and fuel?
Here is a guide that can help you
Before you can check for a fuel or spark related issue you first need the car to crank.
I forgot to ask, but you checked your battery to make sure it was good and the cables were clean and tight right?
If you replace the starter and starter solenoid, but the car still doesn't crank at all, I'm thinking your problem is either a bad ignition switch, park safety switch, or brake pedal safety switch.
Check for voltage at the solenoid; if you get 0, suspect one of the problem mentioned above.
Please run some tests and get back to us so we can continue helping you.
Tuesday, August 25th, 2020 AT 5:45 PM