Looking at purchasing the SRL+ from Gearhead for my 05 I just bought. My biggest complaint with the truck is that when I'm in OD and I let off the throttle it unlocks the converter. My Duramax stays locked all the time above 47mph and I like the connected feel. Is it just my truck? Tow Haul doesn't seem to change anything. Will the SRL+ tune act any different? Thanks