Hello all. I am a new to this tuning hobby , but have a question . I have a 2001 chevrolet silverado with os 12208322 . I have a junk yard 2002 silverado pcm with os of 12212156 or so . I want to clone my 2001 pcm ( 12208322 os ) but pcm hammer says it is corrupted an wont proceed with the write os ...... ect. Different os issue , I have already read the entire pcm for both ( have a xdf for my 2001 pcm) hence the clone of the junk yard pcm . Am I doing something wrong in the write process? I have a bench harness for the junkyard pcm.