I have a 1999 Escalade. A rather annoying problem cropped up at about 25,000 miles. Often when I drive a short distance, 5-10 miles, let the vehicle sit for 10 minutes and restart the engine, I get this whining noise that sounds like a bearing. At the dealership service dept we discovered that if we disconnect the power to the air pump the noise immediately stops. This was after they replaced several idler bearings and an alternator. After the engine warms up more the noise disappears. It doesn;t seem to affect the engine operation but is embarrasing to have a $45,000 plus vehicle that sounds like the bearings are going out.

Anyone else experience this and able to get fixed.

I'm also experiencing the clunk in the drivetrain phenomena that GM seems to have no answer for.