hello and thanks for your reply.I was intending to convert the 01' engine to the '99 standard by swapping all of the sensors,pump,ecm,etc,hence the problem with no tone ring on the crank.The '01 engine is an isb235 if that says anything,the '99 was a isb215.No info if '01 donor truck was std. or auto but could probably find out.'99 is an auto.As I said,I do have the ecm,pump, and harness for the '01,but not the pcm,and the harness has different connectors on the truck side than the '99 harness.Backround info,the '99 truck and engine were in mint shape,but it appears that one of the #6 rod cap bolts came loose,then pulled out,and grenaded the engine.What a shame,I would be really pissed if it were mine,but I got roped in to helping the guy fix it.He got a pretty good deal on this '01 engine,hence the situation.As a side note,they sure screwed up the interchangeability of these engines....:banghead: