Why won't my car start?

Recheck your work, make sure you didn’t leave the post protector cap on. Then make sure the terminals are absolutely clean, none of that black corrosion.

Answer not posting

It's been in the shop almost three weeks. New brain and new module in transmission. They say they can't get the brain to program.

I'd have to say they don't know what they're doing . It's probably costing you a small fortune and that's too bad .

Find another shop. I'm with Chevy on this one. My mechanic would have had the car running the same day.