General Motors LLC (GM) is recalling certain model year 2015-2016 Chevrolet Sonic and Trax, and 2013-2015 Spark vehicles equipped with a Bring Your Own Media radio. The affected radios may fail to provide an audible warning chime when the driver fails to fasten their seatbelt or if the driver leaves the key in the ignition. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) numbers 208 “Occupant Crash Protection” and 114 “Theft Protection.”