Some 2015-2016 F-150 vehicles built on or before 01-Feb-2016, 2019 F-150 vehicles built on 11-Oct-2018 and through 15-Nov-2018 and 2019 F-Super Duty vehicles built on 10-Oct-2018 and through 27-Nov-2018 equipped with adaptive cruise control may exhibit an unintended deceleration event while passing a large object such as a tractor trailer. Follow the Service Procedure steps to correct the condition.