Yes, it was code 43. I turned the KS off in the .bin so I could carry on with the datalogging and VE tuning. Apparently I didn't turn something off because I still got knock counts in the datalog. With the KS having the wrong value I'm not sure I should believe what the log is telling me and it is retarding my timing. I'm not hearing any audible ping. I put a more aggressive timing curve than what GM burned in there. 0 initial, 18 at the bottom, 24 in the middle with a 34 max at 6000 and 20 kpa is what I started with and after seeing knock I pulled 2 deg out of the knock zones and smoothed the table again. I need to get a KS with the right value so I can set the parameters back in the .bin and fine tune the advance curve better and I don't want the KS down in the block drain hole. I use those drains when I do coolant changes and would just as soon not be screwing with the KS once it's installed.