Join Date: Jul 2011
Location: Clinton Township, MI
Are you sure it is coming from the front end? Because I have a similar problem but mine you hear when it hits 2100 rpm. And after doing research, I found out it is a common problem amongst the g6's... there is an air leak in the resonator. But the worst part, many dealers seem to say "they don't know what's wrong with it". I have known of a couple that have said it, but I am finally getting the exhaust replaced this week.
If it is coming from the front, then I think it could be several problems... everything you possibly listed, drive shaft or belts. I owned a van that did the same thing and the squeal was coming from the driveshaft (a specific component, but I am completely blanking on what it's called).