bad instrument cluster

[big boss 2020]

so i put this ridiculios sound system in ky 2015 denali its pushing so much power i need to get a higher output altenator in it       before i could do that all of my gauges and lights started acting up even the head and tail lights flicker in and out what do i do HELP!!!!!!!!!!

[Snowcamo]

Start by getting to big batteries installed. Then the alternator. Buy Northstar batteries 31 series. Those will likely resolve your under fed charging system. Then buy that $1000 alternator. 

[DeePa]

Bad owner