I ordered my Flashscan upgrade last week, I can't wait to get it. My primary vehicle is a 2003 Silverado SS, VIN: 2GCEK19N331xxxxxx
I looked at the supported PCM calibration list and see 12579405 listed as the 2003 Silverado PCM. Today I notice my truck has PCM# 12580786 as shown in EFILive.
Is this number the physical PCM part number or the specific calibration loaded on it?
I had ls1edit fail on a tune last year and had the dealership reinstall the factory program with a TECH2. Would that have altered the PCM #?
Thanks for any insight.
Richard