1989 Cadillac Sedan Bose System

I have searched and read thru alot of posts please forgive me but can someone baby step me thru installing an aftermarket. I want to use the factory amps unles thats not a good idea.Please help,

https://www.the12volt.com/wireinfo/metraKits6.asp?info=alarm&year=1988-1989&make=Cadillac&model=DeVille&ID=7866&type=Kits That'll tell you what you need. Just get the kit, wiring harness, and antenna adapter. The harness will wire color for color to your new deck, and plug in where the factory radio did. The antenna adapter will allow you to use the GM factory antenna for your new radio. Just follow the directions on the installation kit- it'll even tell you how to remove the factory radio, and you'll be all set.My ex once told me I have a perfect face for radio.