One problem related to tire tread/belt has been reported for the 2005 GMC C4500. The most recently reported issues are listed below.
Unfixable front end vibration. Vibration is severe 8-12 mhz @ . 27g's. Over 10 attempts to fix with no results. 4 sets of tires, drag link, panhard bar, 4 turbo down pipes, front rotors and hubs, may other components. Whole body vibration , arm-hand vibration for over 3,000 hrs in one year.