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...
I've got the same issue with my 2012 Yukon 6.2 E38. Only fix I've found so far is to just adjust the override parameters from 240 or whatever it was...
I'd suspect the stumble is related to an ignition misfire as indicated by a massive lean spike shown on the log as the large shift in Short term fuel...