Chevy 6.0 Super Ike Gauntlet

They have a toggle switch on the shifter that u can easily adjust the gear selection yourself. I know that's not what they do, but that's how I run my gas truck. Now with the tune, I really don't need to anymore, cause it keeps in the power band and chooses the proper gear. I usually pull in 5th and lock out 6th. I just got back from Georgia driving on Hwy 19. Was getting 9.5-10.00 pulling at 65mph, hand calculated Driving with the 89 tune. I watched the video and figured typical gm computer management, they really need to change that. Hence for me the tune... I'm sure just the stock truck with using the toggle switch and pulling that grade, u would see considerable difference in pulling and time to get to the top. Again I know that's not the way they test the trucks.