hi im new here, i have a 2018 GMC Sierra that was tuned by a local tuner to Arizona, i have since moved to the east coast, (big difference in driving style). i was wondering if making the change for 6th gear (currently at 42ish, and with my converter the rpms bounce when driving at that low of an rpm) would be something super simple i can do with my hp tuners i recently purchased to start playing with other vehicles i have