One of the easiest ways to add Bluetooth to a vehicle’s audio system is through a Bluetooth receiver. Simply plug the receiver into the 3.5mm input jack (auxiliary in), connect your phone to the receiver, and you can stream all the music you want.
If going through an auxiliary input isn’t an option, your next option is an FM transmitter. Find an FM radio frequency to broadcast the sound of your music over, put the transmitter on the same channel, and you’re set to go.
If you’d rather go the Bluetooth route and opt for a newer ride, consider a GMC made in 2017 or later. Here are a few newer GMC cars that do have Bluetooth: