Chrysler reports that the cruise control systems on some 2011-13 Dodge Durango and Journey SUVs and 2013 Ram 1500-3500 pickup trucks may be slow to respond or may not activate at all when commanded by the switch.
According to the carmaker, the problem is limited to vehicles built on or before May 1, 2013, and is due to software glitches in the Steering Column Control Module (SCCM).
Reprogramming the SCCM with updated software is the only surefire remedy.
Check with a dealer for the application specifics of the flash.