I offer Free Tune updates for 1 year after purchase. These updates usually address drivability issues or other small problems found by me or a customer. To receive an update, please use this form to contact me.Latest Tune Updates:6-28-20: Added full fueling during cruise control operation. Stock fueling is limited to about 60% throttle in cruise mode.11-2019: Changed fan settings on “Tow” tune. Stock fan settings don’t ramp up the fan based on trans temp until the fluid gets to 235°F. The new settings in the Tow tune now begin fan ramp up at 205°F and reach full speed by 220°F. This results in a large increase in time before transmission overheat occurs towing heavy, slow and/or uphill. This is particularly valuable if you have to tow uphill at a speed lower than manual 2nd lockup will occur (about 25MPH).8-3-2019: Disabled hidden pre-injection events on 12 valve tunes creating the only “True” 12 Valve Tune on the market. 2004-2005 Trucks can now use the Tow Haul shift schedule AND keep the OD Off button like the 2006-2007 trucks already have.6-7-2019: Improved pre and main injection timing values for the tow tune.5-19-2019: Improved wastegate settings in all tunes and applied a very much improved 48RE 4th gear shift map to all tunes.