I posted in another thread regarding a steering noise. The noise and harmonic vibration was intermittant and usually occurred while backing and cutting the wheel. Took it in to the Caddy dealer (closest to my work, they were happy to work on the EXT's poor cousin!). I was able to duplicate the noise with the service manager in the truck. Anyway, bottom line is that they are going to replace the steering box. They don't know why it's making the noise, assured me it was safe to drive and they are waiting on the part coming in from Lansing, MI! I'll keep ya posted.