Hi i have a 96 cadillac eldoraldo NORTHSTAR engine143000 on dash. The problem im having is a crank no start. I was driving and the next thing i know I lost all spark. I replaced the (NEW) battery,fuel pump,fuel filter,fuel pressure regulator,spark plugs...........ICM & coil packs( USED FROM JUNK YARD) BUT CHECKED OUT FINE @ Autozone,cam position sensor (USED @JUNK YARD),& both crank position sensors(new).I checked & replaced all fuses under the hood & in the trunk.My compression checked out just fine, No timing issues @ all. all grounds to the car checked out fine No wiring issues @ all. What else could be causing this problem? I came up with code PC0603- this is a memory reset. If you have disconnected the battery or cleared trouble codes, this code will set. This does not indicate a problem. OR DO IT? Should I have it towed to stealers oops I mean dealers lol? Could it be the pcm is fried? all lights come on dash as should.....wipers work...fuel pump works...injectors work...radio works...check engine light comes on as should......even car alarm sounds as should.....I put two new crank sensors in & it fired up for a hour then died...... do i have a bad PCM?