Okay got a 2000 Monte carlo ss and just replaced all coil packs, spark plugs, wires, and also the alternator and the battery!! What else could drain the battery. All of that was fixed 5 days ago and it has ran perfectly fine and nothing was wrong and I went out to start my car this morning and the battery was dead. Please help

 

Good Morning, probably wont be much help, but is it possible you got a bad battery?

 

Make sure you check all of your connections and grounds for your battery & alternator.

 

I have had several batteries that ended up with a bad cell that would be fine, then not! even when tested!!

 

Had the same issue with my 03 ss. After replacing the battery, alternator, and starter the problem went away and the car starts every time.

 

I had the battery for about 6 days and took it to get tested at advanced and the problem was a bad cell inside of the battery. It had 0 amps when it was tested.