Add an Amp Audio Output Adapter. Use this adapter to make your installation of an amplifier to the factory system faster with a cleaner install. Use this plug and play adapter so you don't have to cut or splice into the factory wiring. For adding a bass amp for woofer/subwoofer. Adjustable gain output. Compatibility Notes: Only works with premium systems/Bose that have the factory external amp usually located in the back area of the vehicle. Not compatible with standard systems. Vehicle has to have a factory subwoofer. Connection is done at the factory amplifier. This adapter doesn't have a remote amp turn on wire- use an amp that has auto amp sense detector or you can find your own amp turn on wire which might be at the power side of the cigarette lighter socket (test before connecting). Works with the following vehicles: For vehicles equipped with a factory subwoofer and has a Bose/premium system with the factory external amp. Chevrolet: Colorado 2015-2018, Silverado 1500 2014-2018, Silverado 2500/3500 2015-2019 , Suburban 2015-2020, Tahoe 2015-2020: GMC: Canyon 2015-2018 , Sierra 1500 2014-2018 , Sierra 2500/3500 2015-2019 , Yukon / Yukon XL 2015-2020