Good Morning,Afternoon or evening in what part of the world you are in but I have a question that I find puzzling to me. In all Chevy Tahoe LTZ, GMC Yukon Denali and Cadillac Escalade Platinum have a Bose Systems that come with the Stock radio. Now I was watching Soundman Audio video on youtube and they placed an amplifier into the stock system and said it made the system sound much better. Now is that something I should do since I will be getting a 2011 model of one of these trucks since I want to hear good sound clarity or the stock equipment is ok without it. Thank you and I love this site I read it everyday for sound advice....