Ah ok, on the GMPP ECM's I am not sure if they talk to production OS's in the TCM, the exchange messages might be different. Even between model years on production cars they can be different and cause problems.
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Ah ok, on the GMPP ECM's I am not sure if they talk to production OS's in the TCM, the exchange messages might be different. Even between model years on production cars they can be different and cause problems.
Sounds like i'm in for a test of patience LOL :doh2: Thanks Ross!
bump, i have a couple, OS 24235341 & 24243356. still need a 24239927 or 24252956