Why is my 2006 Buick Lucerne v8 running rough and dying randomly?

What is your question?

There is a rough idle when stopped in drive not park. It also has died randomly but turns right back on. Happens after car is warmed up. No engine light. Sometimes traction control and Stabilitrak lights come on before it dies.

What makes this problem better or worse?

It's better when cold

How long has your 2006 Buick Lucerne had this problem?

Couple months