Escalade runs then won't start up until cool down

02 Cadillac Escalade runs fine until shut off, then won't start back up. I have to wait 30 minutes then it will start. I change oxygen sensors, fuel filter, crank sensor, and fuel relay. Please someone help.

Welcome to AF. Not enough info, cranks won't fire? Won't crank at all, what is the fuel pressure when this occurs, got spark to the plugs? No quick answer here.