2016 silverado really low timing at launch even using min timing

[miguelc]

hello im tuning a stock silverado 2016 ... timing goes to zero or negative on launch even wituhou stabilitrack. i tried on high octane and min timing. do you have any idea.

it is stock just 35 inch tires and a catback
stock.hptel de el cochinazo.hpt

thanks for your help
is there any relatoed to the tires? maibe on the larger tires it thinks is spinnning ? because torque control just goes on after a run

[E.A.]

Some trucks have a really jacked up IAT vs Load table..., and a few have a very odd Ethanol table that carries over.

I am willing to bet you find it in one of those add/subtract tables.