Back from dealer. Ran a "battery" of tests at Hummer of Columbus. They are some of the best techs ive ever dealt with. Anyway, nothing concrete came up. They went ahead and replaced the battery. They also think that the factory batteries are subpar and have limited reserve. They also like the optimas. We'll see how it goes.

 

Sounds good. I assume they replaced it with another subpar ACDelco. Is that correct?

 

Nice pun ralpie. Hopefully that takes care of it but I would test the battery periodically just to make sure it is holding a charge and not having the same issue.

 

You may want to check the draw on the battery while parked.

With the ignition off and the doors closed (don't remember if there is an under hood light, but if there is remove the bulb), remove the + cable from the battery and use a meter and check for amperage.it should be minimal. Anything over .5 A will drain a good battery in a week. If it is over .5A remove fuses one at a time starting with the stereo amp and watch for the amps to drop.

Another possible cause could be corrosion of the battery cables (check both ends).

If you have a problem with voltage draw, an Optima will most likely makethe problemworse. Optimas can sit forever and hold a charge, If it does drain they can be hard to get recharged and often need to be trickle charged for a while before the will take a charge at 14V.

If it regularly spends extended time parked, use a trickle charger or a battery disconnect switch.

 

Could be a defective battery. Mine died after a couple of months. Took it to the dealer and they replaced it under warranty. You might want to hide your amp connections because they will see them and try to say the amp caused it.

 

thanks for the pics mountainbiker.