I have a 2006 trailblazer 4.2.
There is a light that comes on with the lock to it it shuts
down the motor of my car then I can start right back up
when I put it in neutral if I was right back up and doesn't a
few minutes later it shuts down the engine again it's like a
car symbol with a lock in it but the truck never had a key
with a chip in it