Found this on a Corvette forum. Read post #5 it explains why the car will restart after R&R of the BCM fuse.
https://www.corvetteforum.com/forums...ol-module.html

 

Just to throw this out there. May be relevent, maybe not.
Your car has the RPD unit on the dash. The car will not run with an inoperable RPD or one that is unplugged.

 

That works fine.
The link I posted from the Corvette forum (#5 post) describes what happens to me and how I restart the car.

 

The vette is different from the HHR; I doubt that is the explanation. Unless, the faulty segment is on one side or the other of the BCM.

Look at this: https://www.chevyhhr.net/forums/hhr-...3-48534/page2/

Keep an eye on your PM.

There is a TSB with photos about the ECM connector, but I can't find it right now.

Here is part of another TSB:

 

But loose wires or grounds , have you checked them.

 

Are you saying it doesn't have a CAN connection?
What is ment by "Keep an eye on your PM"?

 

There are a lot of grounds. Which ones are you suggesting ?
You would think that if a ground was loose the problem would happen every time I try to start.

 

You don't have a PM like our PM



So I'm guessing he's gonna send y'all a personal message.

 

Stupid is what stupid does, forgot that PM was for private message.

 

It does have CAN, It is just not the same programming, and the fact that guys fixed itself lends credence to the loose connection theory.