3rd Gen. Stereo Upgrade Questions

Hey gang, I took possession of my 2016 Tacoma two nights ago. I ended up with the TRD Sport Access Cab, no tech package. I really dislike the sound of the stereo in this truck and I want to upgrade it badly. I've searched around and I haven't found much info in a specific stereo thread. I'd like to get answers to the following questions if anyone knows them.

1. Does the factory stereo have line level outputs?
2. Is there an amp in the truck today and if so what load is it driving now, 4 ohms or 2?
3. Are there any guides on removing the head unit, removing door panels, etc?

Thanks

 

i am looking to answer some of these same questions, mainly just what I need to hook up an aftermarket amp to the stock HU.