They will fit with the right simple mods. 4Wheel Parts told me I would never get 35's on my first 3'' lift but I had 295/65/20's. They then said no way on clearing 37's with my current lift even with minor cutting/mods. I drive by every chance I get an let them relish in the fact they are clueless and only knowledge they had was what their parts books said and not real life hands on.
Since I adjusted the coilovers to their lowest setting I had to trim the front valance and bumper as well as do the NorCal mod. Since no rubbing issues and the tires tuck up really nice.
Going for the clean look. Details below:
2015 Silverado 1500 LT
Front - 3" Strut spacer w/Bilstien adjustable struts at 1"
Back - 2" Block
Catback exhaust
K&N Air Intake
Airaid Throttle Body Spacer
Tires - 285/65/20 on Stock 20's
5% Limo tint all the way around
Debadged emblems
No rubbing at all.