I have 2013 Silverado 5.3 and after I cleaned the throttle body the engine went up to 3000 rpm so I did the idle relearn procedure numerous times and never worked. While riding all of sudden the truck lost power and cut off. I towed it home and checked the fault codes and it was P0340(Camshaft position sensor circuit), P0507(Idle Control System RPM higher than expected), P0068(Throttle Body Air Flow Performance). So I replaced the throttle body, the camshaft position sensor and cleaned the Mass Air Flow Sensor and still will not crank and I still got the same permanent faults. Anyone ever run into this problem and what was the problem?

 

Try boosting it from another vehicle.

 

will that really help

 

you won't know if you don't try. Is it that hard to do?

 

Any updates on this? Im having a similar issue, just P0340 and someone took this truck to some shops and had some work done before I got it. I think maybe they took the throttle body off also.