I upgraded my dash on my 2008 CTS with a Boss Audio System! A few days later my battery was drained and My key was locked in ignition. Fast Forward: New Alternator, Relay, Starter; it did it again! Do you recommend a 2nd Battery or a small amp to regulate how much the system drains in motion or...

Hi all, this is going to be my first post here and I’m pretty excited about it. I have an Auto 2012 CTS-V Coupe. It has a few mods already but I’m trying to see what it would take to install some more. What’s installed: GP performance stage 2.5 cam Double valve springs, Chromoly pushrods...