i cant find out how to change the shift points on this thing (u7194 07 silverado 5.3L) i allready have the 87 tune on it little help thank you

i have one size biger tire then stock you would think it would be able to work with that good thing i dont have a 6in lift with 35

hey i just called down there i told them what i did 87 tune removed DOD and tire size. She said that it was my tire size so i rest them back and installed the 87 tune. i drove it about 10 miles so for so good. what can i do to change my tire size with out that happenig agin

Hi i just got my predator today i loaded the 87 tune and disable the DOD everthing went fine. then i drove it about 6 miles and my e break and ABS light came on i can i fix this thank you

2007 silverado
5.3