[Redog]

First, how old is the battery? If it's the stock Delco, they are only good for 2 years, at least in my experience. You could try a new battery, that could be it.

I also see you're up in WI, cold weather kills batteries, esp if the car sits for a while. My batt died in Dec 02, It was going, didn't drive it for one day, next day wouldn't start.

Did you hook anything up lately? If so maybe you have an open circut somewhere that is draining power. It's possible.

I doubt it's your alt, but I wouldn't rule it out just yet. The alt draws power to start the car, but then recharges the batt while you drive.