Installed K&N 63 cold air system on 2015 Colorado, and yeah, it's a little stronger, but automatic trans shift point are very unfriendly to it. Engine starts pulling hard air, before downshift occurs, so your giving it more pedal, to make it downshift! If you drive it in manual mode, you can make it stop, but just not sure if it's worth all the noise. Took it off, then put it back on, and fighting going to the garage right now, and reinstalling factory stuff! Guess perfect world would mean a $400.00 programmer, and adjust shift points. It needs to stay in 4th, or 5th around town, and save 6th for the interstate. Shifting points all screwed up, and it easily bring the air noise back at every touch of the pedal around town, and in 6th on interstate, you get the air pulling sound, just staying with up and down lane speed.
Guess I'm looking at factory air box K&N filter. And yeah, Auto Anything customer service sucks. Don't go there for your stuff!!!! 3.6 Z71
Last edited by Cologuy(06); 02-23-2016 at 02:58 PM.