Hello, just bought my Cadillac 7 months ago, very good condition W/ 67k miles. Fast forward to now. Just got 2 10inch subs and 1000 watt alpine amp installed and I've been coming across issues of the battery draining. Yesterday my car still had power but not enough to start so I got a jump took it back to the installer and they changed some connector to the amp saying that my market stereo is tricky when sending signals and then also replaced my amp with a 500 watt jl amp. I noticed as I'm driving the battery info fluctuates between 14.3-14.8 while still saying OK and also some mystery service airbag message has popped up on the info system once before the battery died the first time and now again after this 're-install'. Battery has now dies again but not to where the lights aren't cutting on..the car just won't start. As I wait for this jump once again I am wondering of any alumni cadillac owners can give me any insight on key things to ask the installers and if there are any known issues, tips and tricks that you can share with me on installing after market audio parts while still keeping the stock radio. Thanks in advance!