There should be a four letter BCC on the sticker on your ECM like ABCD. That is the broadcast code. It's also on the MEMCAL inside the ECM.thanks I do not know the bcc truck is some where else just curious abut it really do not want to change any thing on it did do some research on it and it seems that 350 tbi that was paired with 480e also used this pcm I do not know if this means any thing or not but it has one red and one blue connector I was told that I was also told that the engine transmission and t-case that are now in my truck came from a 94 K-2500 suburban