Cadillac Repair: electric power lose, serville, dash lights

Question
2001 caddy serville sts  engine shuts off all dash lights and gauges go off.  engine restarts right away. this happens about 5 times a day.

Answer
IS or HAS the CHECK ENGINE light ever illuminated while driving the vehicle and or has any other lights illuminated or any messages from the message display center ?.

What work or diagnostics of ANYKIND WHAT-SO-EVER have been performed on the vehicle trying to fix this problem ?.