Yes, use 12212156 for the new OS. Sounds like you might need to take the lid off and ground that pin on the board to recover your PCM. I've never seen an XDF for 12216125.
Rick
Yes, use 12212156 for the new OS. Sounds like you might need to take the lid off and ground that pin on the board to recover your PCM. I've never seen an XDF for 12216125.
Rick
1970 Chevy El Camino, LM7 Engine, 4L60E - Two 896 and two 0411 PCM's
Well, I saved this one. I installed the LS tune I'm using in the 73 C10. I'll be installing it in the 73 to make sure everything works.IMG_20220410_085706848[1].jpgIMG_20220410_090118056[1].jpgIMG_20220410_085713693[1].jpg
Last edited by custodian; 04-10-2022 at 04:27 PM.
Thanks, I used the LS tune I'm using for the 73 C10.Originally Posted by B52Bombardier1
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