my daughter has a 98 pontiac grand prix the car was dead when we got back from vacation, i tried jumping it and it wont turn over, i used a jump box and it still wont turn over.
when i take the cables or box off it is totally dead. i think it has to do with the factory alarm because the key fab went dead.
Try jumping vehicle again with another vehicle but this time leave cables on for a few minutes with the vehicle that is jumping at idle this will help charge the battery of the vehicle you are trying to jump.
The battery could be flat out done. That might be why it was dead when you got home and it might be so badly deteriorated internally that even jumping won't start it. Take the battery out and have it charged and load tested, that will tell you if its time for a new one.
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