Went to lunch, came out to a dead Buick. No alarm, no power anything, lights out. Assumed 1 year old battery had died. Tried to jump start it, no clicks or anything. Any direction as to what to check next would be greatly appreciated.

Well, if the battery is completely dead, you will not be able to jump-start it, without first charging the battery. You need to have someone test the battery under load and check both the positive & negative cables to verify that they are clean & tight.

Thank you for the help. Turned out to be a dead cell in the battery.