Chevy's IBC (integrated brake controller) setup question

My '08 GMC IBC is set at 7 and the new fiver stops great. My old fiver I had the IBC maxed out. Remember these don't have the same stopping feeling as the after market do. These are designed to feel as one whole unit and you won't generally feel the trailer grab. Make sure you are in tow haul mode and you will use a lot less brakes as the Allison is awesome at slowing the rig down. Take it out, get up to speed and try some hard braking to get the feel on how it works. I love the IBC on the new trucks.