I need help, the sub in my tahoe makes a buzzing noise when the vehicle is running. But I cant get it to go away unless I completely unplug my RCAs?

Is it a bad ground? Bad Rcas?

the head unit is a Alpine cva-1003 if that helps at all.

 

look at your -neg- on all parts
add a neg to your rca's at your deck
then tell me if it is there