I'm hoping someone can help me track down a vibration that has developed for about a week now. I feel it the most when i'm in gear and stopped and I feel it in the steering wheel, pedals and gear shift. it's a 'fine' vibration that goes away when I knock it out of gear into neutral. It may be there when i'm driving but I don't feel it then. The only thing I've done lately ( about 3 or 4 weeks ago ) is install a new clutch fan and CPAS . It's an '05 Envoy w/ 198,000 miles, 4X4. I have no codes showing or pending and no other driveability issues. -- Any ideas ??