ReadyLift 69-3416 Lift Kit Max Lift - 4.0"F/1.75"R - Max Tire: 33" Not for use on pre-2014 GM 1500 trucks Does Not Work With AWD Denali Trucks. Will NOT work with 2013-UP Z71 OFF ROAD trucks with Tall Rancho front struts. For Trucks with STEEL Front Suspension Only. 2014 GM 4" SST - STEEL