Depending on where you buy your Apple car stereo, it may come with free installation. Failing that, Best Buy charges $100 for installation and promises a factory-installed look without a loss of factory functionality. You’ll have to pay for any additional parts beyond the flat labor fee.
When it comes to self-installation of a head unit, you have a few options, but both involve premade wiring harness adapters. Scosche and Amazon sell a variety of connectors that eliminate the need for cutting and soldering into the factory wiring harness. You can also pick up adapters so you don’t lose features like OnStar, steering wheel controls or door chimes. These range in price from a few dollars to more than a few hundred bucks, depending on the complexity. You can buy trim pieces and mounting kits as well and chances are finding a YouTube how-to video for your stereo model and vehicle won’t be too difficult.
