Black94lt1

iTrader: (1)

i have a 3 month old 07 sierra classic ext. cab with only 1,100 miles on it. i'm really wanting to put some LT headers and and off road y pipe. will this set up throw any codes? is it a good idea to do this with the 5 year 100k mile warranty? i figure if anything major happens and i would have to take it in i could just put all the stock stuff back on. this is the first new vehicle i've owned so i've never had to worry about warranties.

KevinF56

iTrader: (9)

well, if you get o2 sims for your rear o2 sensors it wont throw codes. you could also get a custom tune and delete the rear o2 sensors. i'd recommend the tune because then you'd get the most out of the headers power wise.