First chance to look at the car today, checked all the fuses, removed the aftermarket radio and put the original back in, still not starting. I checked the fuses in the module in the passenger footwell, while I was in there I pulled the plug nearest the rear of the car, I put it back in and the car started. I tried it 4 times started every time. Put everything back together and it wouldn't start, I went back to the plug and tried again nothing. Don't know if it's the plug or if I reset something when I unplugged it. On the plus side looks like I'm getting closer to solving the problem

 

You said you made sure that the battery ground had a good, clean connection. What about the positive and negative posts?

Did AAA check voltage, or did they perform a load test?

 

Plug ? What plug ? Sorry, but that description is very vague. Could be just about anything. Maybe a picture would explain it better.

 

The large plug in the BCM in the passenger footwell behind the panel under the radio, sorry I thought I'd made it clear I was looking in there. There's 2 large plugs I pulled the one nearest the rear of the car

 

 

If disconnecting the battery for a short time makes it work a few times it is because the computer is resetting; otherwise there is a pin in the connector that is not seated.

 

After months of using the my company van I finally bit the bullet and took it to the dealership. They found the fuse box under the hood was bad, they've ordered one and I should be back on the road Wednesday/Thursday

 

"Bad" in what way? An entire fuse box just up and stopped working? I don't recall you saying all of the electrical system was dead.

 

It is usually bent or loose pins or the two halves are loose.

https://www.chevyhhr.net/forums/how-...rmation-59520/

just for your information or, you can fix it yourself!

 

All the electrics aren't dead, must be just a certain section or a part of a connector that's gone bad.