I wounder where the camshaft position sensor is located and the crankshaft position sensor is located on a Hummer H2-03 6,0l vortec engine and if there is any problems to change them. My Hummer starts an runs great for a mile, than suddenly stops and will not start for about an huour, than suddenly it runs great again i have changed the fuel pump and filter so now its up to the sensors. sorry about the spelling i am from Sweden.

 

I am having the same issue , I changed the fuel filter and it still shuts down i didnt change the pump because i can here it running and they normally just quit when they go bad on all gm cars Ive owned in the past please post the solution when u find out
thanks Ray

 

I changed the crankshaft position sensor located above the starter engine. Then it worked. Check the fuel pressure.... but now i drive a dodge pickup cant trust those hummers