tuner or gears for a hummer on warrenty

[slippy]

Im about to get my 37's and i was wondering what you guys thought. i need to regear or reprogram my computer becuase iv been there done that with big tires and have nothing to offset it, it sucks!
im under warrenty right now with 80k, and it goes untill 150k.
the chip can offset the gear ratio but i would have to untune when i go to the shop under warrenty.
Gears would be a one time thing, as long as my diff. doesnt grenade i shouldnt have to worry about it...