are all 4l60e's the same??
 

Are all 4l60e electronically the same? IE, not the connecting to the engine but electronically would a 1994, 1998, 2003 4l60e's interchange on a 2001 silverado 6.0?

93 truck and 94-95 are different electronically, 96 UP are electronically the same
Now case wise there are several variations but since you didn't ask that I wont go into it