This morning I awoke to find something weird - my battery was dead. The radio still worked, and the lights worked (they were dim), but I didn't get any action from the starter or solenoid.
So, I jumped it and it started right up. Then it ran terribly - like it was firing on 1/2 of the cylinders - barely running. The "Reduced Performance - Safety Mode" light came on. I let it run for about a minute and then shut it off and disconnected the jump leads. Then, I restarted it and it ran fine - but the SES light was still on.
So, I drove it to work, and now the SES light is off. But...I'm still worried and confused as to what killed the battery. I just installed an auto dimming rear-view mirror which makes me nervous. But, I pretty good electrically and I know it's switched power and not a constant +12V. I re-confirmed this today.
Anyway....I guess I'm just wondering if anyone else has had experience with your GTO running terribly after being jumped. I don't want to take it to the dealer - especially now that it's running fine and the SES light is off. But, it's under warranty so it wouldn't cost me anything (other than time and hassle).