I’m having a issue with my 2000 2500 6.0. It runs and drives fine when it’s cold or the first start then after driving it 10-15 minutes and park it to go get something at the store. I come back out and it doesn’t try to turn over or anything all lights come on the fuel pump runs but acts like it’s getting no signal to the starter to crank. If I let it sit for about 10 minutes some times longer it will start. I’ve checked the wiring to the starter replaced the relay and still can not figure it out. Does anyone have any suggestions?

 

Replace the starter. If it won't crank when hot, solenoid is probably the issue.