I wanted to upgrade my 2007 tahoe os to a 2009 to match to a 6l80e swap and just get the extended maf and injectors table but GM sps won?t recognize the current os so I cannot refalsh it. So is there a way to go back to the original os? Do I just ignore the message saying os doesn?t match with hptuners rewrite full and put a stock tune in it? I just didn?t want to screw up the ecm brick it if there was another way to reverse it. Lsa blower swap and had all kinds of weird issues on that os so swapped to another e38 tuned it vve and ran great but out of maf on that one and wanted to go larger injectors now for e85 and saw 2009 os has everything I would want. I know the techem from the 6l80e is 07-09 year break as I do trans for a living. So programming on that end will be fine. So as long as the 09 os can write to this part number e38 I should be good. Yes I have a second e38 but don?t want to fry the one I currently use Incase this doesn?t work out and why trying to write the 2 bar os I?m not using.
Thanks