Well having problems loading a tune.Was putting in the trans and i relocated the passenger side batt to the bed and a friend of mine was boltoing in the trans cross brace and pinched the battey cable under the nut grounding it out.Went to put the cable on the battery and the fireworks started.It fried all the grounds out of the ecm,i bought a used ecm installed it and now have no power to the ecm fuse and im having a bunch of body codes and the security light is on.So does that mean the bcm is most likely fried also?If so can a used 1 be installed and programed or is it vin sensitive and now i have to buy a new 1? 