Apologies in advance as I am a novice at EFI live.
I am installing a replacement E39A PCM in a 2016 Buick lacrosse that has push button start. PCM has the correct VIN and flash for the vehicle. When I click the VATS relink button a window pops up in EFI Live saying that relink has been initiated and to leave the ignition on for 10 minutes then turn off the ignition wait 30 seconds and then disconnect power. It is then supposed to relearn on power on. I have tried multiple times and each is unsuccessful. No crank but also no security light.
I am using EFI Live 8 with V2. I always end up with P0315 and P0633 codes which are crank variations not learned and immobilizer key not learned. Can't fix P0315 until it runs. I must not be doing something just right. Any tips or tricks that I should know?