Motor swap From a 99 4.8 chevy silverado to A 00 4.8 out of a silverado 1500 I have the motor in and im having a crank no start problem I have replaced starter I have Made sure I have 12v at the COIL plugs WHY AM I GETTIN NO SPARK I HAVE DONE THE PASSLOCK BYPASS STILL NO SPARK Please help also have changed crank sensors