help!grandam stalls,bucks after warm up.

I have a 95 grand am with a Quad4 engine .it stalls out and bucks
like crazy after the engine reaches normal opperating temp.
when it stalls out ,I have to wait for it to cool back off before it will
start. please help.

A lot of quad 4 engine develop problem like bucking, engine miss, loss power, etc. It is caused by a failing ignition coil housing. You can't fix the ignition coil because it is inside the plastic coil housing. Just replace the ignition coil housing around $60. It is not difficult to replace. Just take your time.
While you are at it, replace your spark plugs as well. Make sure you check the gap of the spark plugs because most of the time, the spark plugs is not gapped to proper specs.