Purchased a Z71 RST in January. The day after purchase, I traded in tires and bought BFG KO2 A/T. I figured I would share that 275/65r20 (~34" tire) fits perfectly with no modifications to suspension/level kit. Truly love the truck and MPG is incredible. My only complaints are the amount of DEF fluid consumed when towing (tow ~4k lb bay boat frequently) and I personally dislike the push button parking brake.
