Have a 2008 tahoe that is showing constant knock as soon as you start driving. Have replaced knock sensors and lowered timing in spark tables and still have knock it shows its operating out of the low octane table entirely with the knock learn at 1 cant seem to figure it out fueling seems to be alright as well any help is appreciated log and tune attached below thanks i also logged each individual cylinder as well showing knock in all
RUS STOCK FILE hi_lo octane 1.hpt18-10-30 10-12-07.hpl