bose system 2005 Z71 put replacement Bose amp in my Tahoe now have a buzz coming from back speakers

[Levi ‘05 Z71]

So just replace my boss audio amp with a factory replacement Bose. Now after plugging in the rear stereo unit for the rear speakers to work I have a small buzz that gets louder as I accelerate. Got told to try and ground out the amp itself but would like someone else’s opinion on what could be the issue.

[dsr611]

Most of the time, the "buzzing" you are hearing is due to a grounding issue.  Make sure you have a good ground...no paint, good metal-metal contact, etc