Not a pulley problem, but this might help somebody. My Grand Marquis developed a light, random squeaking going down the road and it drove me nuts. The dealer naturally recommended new struts and replacing nearly everything in the front suspension for over $2,000 since it was just out of warranty. Passed on that great deal. Got home, opened the hood to check something and when I slammed it, I heard the squeak! Put a dab of grease on hood latch and that fixed the problem. Not a peep out of it for the last 15k miles. Sometimes it just the simple things.