Developer's DescriptionBy Sergey LGMpreheat allow user to start engine by scheduler from android based phones via OBD II device : Scantools.net - Obdlink Mx (bluetooth, wifi)...GMpreheat allow user to start engine by scheduler from android based phones via OBD II device : Scantools.net - Obdlink Mx (bluetooth, wifi)GMpreheat will be compatible with vehicles that supports sw gmlan,can bus communication.Supported vehicles : Full support for Impala Lt or Ltz but also supports other modelsPlease test functions before purchasing individual functions in app purchasing.Chevrolet:Impala Lt/Ltz, Avalanche, Cruze, EquinoxCorvette Camaro Cobalt Malibu SilveradoSonic Suburban Tahoe VoltCadillac:DTS Escalade CTSJeep: Grand CherokeeGMC: Sierra Terrain YukonAcadiaPontiac:Vibe ,Torrent,Solstice,G5,G8Buick:Allure, Enclave,Regal,Lucerne,LaCrosse