An unlocked ECM?
Realistically, a factory dsp 2/5 option instead of having a tow/haul button, exhaust brake, ect... have a full econ mode, light tow, heavy tow, and full sport mode from the factory.
Get rid of the limp/reduce power/speed modes related to the urea, no point leaving someone stranded cause of no fluid/bad fluid when it's not doing damage to the truck. CEL is enough.
Allow users to change tire size, tire pressures, remote start timers, ect without any tools or stealership trips.
2011 Chevrolet Silverado 2500HD WT, Victory Red, 4x4, ECLB, Duramax(LML)/Allison, Heavy Duty Towing Package
Insalled: Amp Research, Amsoil, ATS, Autometer, B&W, Back Rack, Bushwacker, Code Alarm, Cognito, DRP, FASS, Goodyear, H&S, Hypertech, Mayhem, MBRP, Plasti Dip, Precision, Ranch Hand, Rearview Saftey, Rhino Linings, Rigid Industries, Rough Country, S&B, Snow Performance, Titan, Warn, Weather Guard
Need the Guts to Install: Frost Fighter.