Hello all. Trying to use GM Techline SPS and MDI to flash a stock cal to a used e38 ECM with same service number (12612384). This is for a 2008 Tahoe 5.3 VIN 0.
So far have been unsuccessful. First attempt was with one from an Impala V6 car. Same service number. GM SPS detects a different VCI and asks if I want to Accept, Overwrite or Cancel. I am able to flash the replacement ECM with the correct calibrations and VIN, learn the VTD. But it starts poorly and runs lean. Barely performs the CKPV and sets DTC's for AFM solenoids.
Read some info about TAC throttle info not being update-able in the ECM and causing trouble.
So tried an ECM from a 2008 V8 truck and does the same thing.
Is there a remedy to this? Or should I just buy a new ECM?
Thank you in advance.