1 - [Replace Factory Radio] - Used to replace the factory oem radio with your aftermaket new radio. | 2 - [Support amplified systems] - This harness can be used to connects an aftermarket stereo to the factory amplified system. Factory radio Navi system w/o Ext amp is available. | 3 - [IMPORTANT] - The wires are standard EIA color-coded, however, due to [Variations in (Vehicle Model) or (Aftermarket Radio Model)], the connection method may vary. In some cases, need to match wires by function rather than color, to do so, it's important to check 【BOTH Radio Wiring Diagrams】 of [(Aftermarket Radio) and (Vehicle Radio System)]. [Aftermarket Stereo Harness diagram is offered by Aftermarket Radio Manufacturer] | 4 - [Red ignition wire] - Not for all vehicle models, but if OEM radio harness of your vehicle has no ignition wire, aftermarket stereo can not be turned off/on through OEM radio harness. To solve this issue, need to get 12V power from the ignition by running the red cable separately from the [OEM radio harness]. Simply attach one end to the ACC wire of the harness that comes with aftermarket radio, and connect the other end to the ACC wiring position located behind vehicle's ignition switch. | 5 - [Applicable models] - Compatible with select 05-15 Chevrolet GMC Pontiac Enclave Lucerne Avalanche Outlook vehicles, please see the specific information on what vehicles the adapter will fit. | 6 - [Packing List] - 1 x 14+16pin Stereo Wiring Harness, 1 x ignition power wire, 32 x Butt Connectors | 7 - [Note] - Two wiring methods are provided in the pictures, before installation, please refer to one of the wiring diagrams base on your stereo radio functions.