My 2011 Buick lacrosse push button start. Won't crank. No power at all. Nothing. Key pad dosen't respond. Nothing.

What is your question?

No power on my 2011 Buick lacrosse. Won't start. No lights on dash. Key pad not responding. Died on me last week but I touched the negative battery side post wire and the power jumped back on. Not this time. What do you think my problem is.