Stalling when warm

[69wildss]

I have a 2003 Tahoe with a 5.3
After driving approximately an hour, the vehicle dies
If I let it set for 15 minutes, it will run for about another half hour and continue doing so
Battery level is good. My little scanner shows a RPM while cranking when it won’t start.
There is good fuel pressure
What should I be looking for?

 

[Fless]

A possible vacuum leak. Also, how dirty is the throttle body? (Will your scanner show you the IAC position when the engine is warm?)

 

[rockola1971]

Any codes being thrown?

 

[Marky Dissod]

Before bothering with more diagnosis, clean the everlovin schidt out of your throttle body.
Physical cable throttle or electrical signal throttle?