2006 6.6L Duramax has a CKP Circuit code I have followed the trouble shooting list from Alldata and still am cornfused Here is my delima I have 5V on the sensor reference at the CKP verified it at the ECM pin 79 and verified there is not a wiring issue from the ECM. Is there supposed to b any voltage on Pin 79 or do I have a bad ECM ......Any help is greatly appreciated!!!!