Changed brake master cylinder on my 2006 HHR today. Removed and replaced fuse box and now car won't start. Turn key to start and all dash lights go out and no starting of engine. Checked voltage and have only 11.7 volts. Not sure if enough but it has been starting fine. After a few seconds a message pops up in message window to "Service Air Bag Soon".

 

You probably didn't get the fuse box seated together right, or the connector to the ECM got a bent pin.

 

Thanks. I had checked the tabs 3 times prior to posting. However, this time I took the fuse box off again and inspected, everything was okay. However on reassembly, I left the 4 sections setting on top of the plastic locking tabs and started the 4 screws and tightened them down prior to snapping the top section down. This time everything worked as it should. You were correct in that it was not making complete connection before.

 

Dammit! I hate being right.

 

LOL - oh I hate it when you are right as well.

Glad all is well with the "fix". :)