One problem related to steering gear box shaft pitman has been reported for the 2003 Chevrolet Silverado. The most recently reported issues are listed below.
2001 Silverado had clunking at low speed turns. Dealer packed grease and ordered new steering box. Never came in. Purchased 2003 hd Silverado. At 50,000 the clunking at low speed turns is starting. You can hear and feel the play in the steering wheel. Is there a defect in Chevrolet steering assemblies?.