I have a 00 Silverado Z71, 4.8. 6 inch lift running 305/70/16 tires. Truck has 319,000 miles, original motor with I asked 4l60e transmission.
I recently noticed a whining noise that sounds like it is coming from the left front area.it seems to start around 20 mph. It I'm really noticeable when the windows are up. I've had my head out the window at 50 mph and can't hear a thing. But when I roll the window up it is very pronounced. Anyone have any ideas?