hello everyone
I need some help tuning my 2004 trailblazer 4.2
i spent a couple of days on it and its still has knock retard (KR) on stock timing it was pulling around 8 degrees until i got it to where it is right now.
down is attached my tuning file and the data log.
please let me know what i can change and if you see what i am not seeing, i am new to hp tuners. ''