2002 Oldsmobile Silhouette 6 cyl Two Wheel Drive Automatic 98000 miles
2002 Olds Silhouette Van 3.4L V6 98k miles, I have noticed a whirring noise recently that starts once I reach 30 mph, it doesn't appear to be related to engine revving or not shifting gears, RPM's are normal and engine sound is quiet when at lights or idling at start-up. The noise reminds of an airplane in flight. Recently had low brake fluid light come on and I filled it up and it appears to be holding for last 2 weeks. No reduced braking power. This is my wife's vehicle so I'm not sure if the noise started prior to or after brake fluid warning light. No other warning lights or other issues that I have noticed. What could be causing the noise?