Quote:
Originally Posted by samckitt
OK HPT experts, got a dilemma.
I have 2 different E67 ECMs, one is GMPP & the other is 09 CTSV, I can/could write to both of them without issue. But I mistakenly did a "Write Entire" of the GMPP tune to the CTSV ECM (which worked), but now I cannot write anything to the CTSV ECM, says vehicle not recognized, or registered, or something like that.
Am I hosed now & have to use more credits to enable that ECM again? Or is there a way around it?
Thanks
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There are two different versions of the E67 ecm. GM changed them during the 08 model year (I think), so if you're GMPP ecm is an older one, and your tried to write the 09 file onto it, you have corrupted the ecu.
You might get lucky and be able to flash a factory GM program onto it with TIS and a MDI2 (factory GM tools), but I have had mixed success with that. Also, being that it is a GMPP program, you would then have to track that down and write it to the ecm via HPT.
Sorry if thats confusing, I deal with all this stuff a lot, so it makes sense to me. Hahaha