change tire size to high floatation tires

[2009z71]

2009 chevy silverado z71

just put a level kit on it, and some 33x12.50x18 toyo mts.

i had 265/65/18 on there, and i was wondering how i could change the tire size on the trinity to high floatation tires

i have the trinity, dont no the model number? and i havent updated it since ive had it...

anything will help guys, i appreicate it

[mikel]

Under the modify tune menu, you'll see a section to change tire size, set it to 33", and reinstall the tune.