Why is my car acting like it has a bad coil?

What is your question?

05 Buick raniere v8 5.3 Stalls going down the road. Acts and feels hot. Let it sit for half hr give or take, it fires back up. All fluids are at normal temps and levels. Temp gauge shows normal temp. Happens with or without the a/c on. Top radiator hose is almost flat when engine is cooler...

What makes this problem better or worse?

When engine is warm

How long has your 2005 Buick Rainier had this problem?

Last few days