Use this adapter to make your installation of a subwoofer bass 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. Provides rca output. Adjustable gain output. Not compatible with factory amplified stereo systems. Only works with factory non-amplified systems (no JBL/Synthesis, Bose, etc.). Connection is done at back of radio at the radio tuner. Compatible vehicles: Made for Chevrolet: Colorado 2015-2018 (No 7 inch factory radio vehicles), Malibu 2016-2017 (No 7 inch factory radio vehicles), Silverado 1500 2014-2018 (No 7 inch factory radio vehicles), Silverado 2500/3500 2015-2019 (No 7 inch factory radio vehicles), Suburban 2015-2017, Tahoe 2015-2017, Made for GMC: Canyon 2015-2018 (No 7 inch factory radio vehicles), Sierra 1500 2014-2018 (No 7 inch factory radio vehicles), Sierra 2500/3500 2015-2019 (No 7 inch factory radio vehicles) , Yukon / Yukon XL 2015-2016