I have a 2002 grand am that is totally dead. Nothing comes on. When trying to get a jump from a friend there was no response. My battery is 13 months old.....Why is it totally dead?

The bad battery may just be bad,even trying to jump a bad battery sometime,s doe,s not work,,go have that battery load tested.

Try unhooking both battery terminals. Hook up the jumper cables to the terminals. Then try starting the car. If it doesn't work then your battery cables might be corroded, broke or shorting out. If it starts then its the battery