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. Provides rca output and a power wire for the remote amplifier turn on connection. 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. No 7 inch screen radios for some vehicles- measured diagonally. Compatible vehicles: 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, 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