Web-programmable, standalone remote start solution for GM 'SWC' models 2004 to 2012. Includes custom t-harness for ‘plug & play’ installation. 2007 to 2012 vehicles support remote start from factory transmitter by pressing 3 X LOCK. Can be paired with a compatible range extender kit sold separately. 2004 to 2006 vehicles require a compatible range extender kit sold separately.