PAC AP4-GM61 AmpPRO 4 Amp Integration Interface for Select 2014-2019 GM Vehicles with Factory-Amplified Bose Sound Systems, AP4-GM61 Provides factory sound system upgrade solution for factory, fixed-level, databus-controlled sound systems Compatible with all trim levels of Cadillac(R) ATS 2015, CT6 2017, and Escalade 2015-2019 Chevrolet(R) Camaro 2016-2018, Colorado 2015-2018, Corvette 2014-2019, Cruze 2017-2018, Equinox 2018, Impala 2014-2016 (non-Classic), Impala 2017-2019, Malibu 2016 (non-Classic),...