Cadillac Repair: Cad Deville stalls and recovers, hot weather, air conditioning

Question
Cad  stalls and immediately recovers when driving in very hot weather and air conditioning is
turned on.    Happens about three or so times per year.

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 ?.