cant get battery to jump start, battery 1 year old on 2008 Cadillac Escalade

I have tried jump packs, cables and chargers and still cant car to jump, I can put on a jump pack all lights come on, and components, when I go to turn it over it just clicks

Asked by for the 2008 Cadillac Escalade
Buy a new battery just because its 1 year old doesn't mean that its good, Sometimes they last for 5 years sometimes they last 1 year and until you know the battery is good no use trying to trouble shoot any further
1 more answer
It's probably not the battery. You'll want to move up the starting/charging system to the starter and starter solenoid. It's probably time for professional help.