A few weeks ago my 08 hhr did some strange things when I started it up in -14 deg weather. The car made some clicking noise under the dash when cranking then my security light stayed on for that entire key cycle.
I passed it off as just one of those weird weather problems until yesterday when I started my car to go home from work and it happened again. This time it would not crank and my dash gauges and running lamps flashed rapidly. The first place I looked to investigate my problem was the battery connection at the under hood fuse box.
Sure enough the battery cable would move when I gave it a wiggle then my lights stopped flashing the clicking noise stopped and the car started right up.

So I will be checking and servicing this connection as I do my regular under hood service maintenance from now on.

Just passing on this experience so as it may help someone in the future.

 

Thanks for the tip Lucky, will check them today.....

 

Good tip Lucky.

I do recall some other members here that found this same loose connection.
As far as people posting about weird electrical problems, maybe our responses should start with: "Check the underhood battery cable connection 1st."

 

WOW Lucky,

That was a Hail Mary fix.

I am impressed .....

Thanks for passing the info along.

It's kinda the grown up version of the loose fuses ...

SF

 

I check mine every other oil change! it has been loose before but not after I started this service check last year.

 

I checked the battery cable first because of what I have read on here over the years. This site is a great source of information. Even a blind squirrel finds a nut occasionally.