I have a 2005 GMC Envoy XUL XLT with Bose speakers and recently put in a Pioneer Z130BT and I have been getting a high frequency noise that gets higher pitch when the RPMs are higher. It doesnt happen all the time just half the time. It almost sounds like the noise the dentist tools make when...

Ok, I had the rear speaker buzz. I have a 2005 TB with the Bose system. I thought - factory speakers are crap and crapping out so I put new speakers in. Not the problem. Some said the rear entertainment controls affected theirs. I unplugged it and jumpered the wires in the plug so the speakers...