This harness is for those adding an aftermarket amplifier to their 2016-2018 truck, and do not want to cut any of the factory wires. This harness will have a set of leads on it for each front and rear speaker. Leads on harness are 6" long which allows you to add on your own wire to the amp. This is only for those that have the 8 inch screen (IO5/IO6) with speaker codes UQ3 or UQ5. Will not work on trucks that have a factory amplifier. Please contact us prior to ordering if unsure on yours stereo system. Also please provide your vin# when ordering as we will confirm fitment for you. With this harness installed and no amp added, there will still be sound from the speakers. As all the wires are still passed thru. We have also included a ground wire as well as a battery constant wire. Fits 2015-2018 Chevrolet Silverado's 2015-2018 GMC Sierra's 2019 Chevrolet Silverado HD's only 2019 GMC Sierra HD's only
