Hello I want to install The sound system I took out of my Silverado. my question is where should I tap in for the signal? can I tap into the factory sub to do so? I have a 2015 lariat and I don't think I have the premium sound.

 

You can connect into the factor sub, you will need a L.O.C.
(Line Out Converter)

Connect the leads to the sub leads then run the RCA's to your amp.

I have done this to my 2015 Lariat and sounds great!!!