Steve_B34

Earlier this year we got my wife a used 2015 Yukon XL Denali with the 6.2 and 8-spd trans. I did quite a bit of home work on which tuner I wanted to go with and I landed on Livernois. I did the Stage 1 that includes a 160 thermostat, cold air intake, and handheld tuner. The truck is very strong with the 91 tune, and the 93 tune will get it to 460hp and 550 torque. I'll race anyone who wants to and I like to drive it like I stole it, using maual mode as needed. With all the hard driving included, gas mileage went from an average of 16mpg before tune to 15.6 mpg. I do run Royal Purple and AmOil fluids throughout the entire vehicle, which helps with the gas mileage, freeing up a few horse, and protecting it while I beat the tar out of it.