Re: Sub issues
you'll need to tap into the rear speaker leads off the the stock amp.
coming soon... 2015 Altitude - Billet Silver
Park Sense, Backup Camera & 9 Speaker Audio
Ready to install: 1.25" Boras, Gorilla Black Lugs, Overland Black Mesh,
4" Chrome Tips, Polk Center Speaker and Sylvania Ultra H11 - Lows & Fogs
Previous: 2014 Altitude - Billet Silver - Lemon