One problem related to axle hubs has been reported for the 1999 Chevrolet Silverado. The most recently reported issues are listed below.
Excessive shimmy in the front end at approximately 60 to 65 mph. Truck has been brought back to the dealership numerous times for repair, but no repair was available. We were told when a repair was available we would be called. To date, there is no repair available. I my opinion it is a hazardous situation due to loss of control, especially in wet weather. We have no idea if the problem is causing other front end damage. The tires have been rotated and balanced, front end aligned and then we brought it back to the dealership as per bulletin #99-03-002 (replaced both front hub bearing assemblies/ right and left rear spring eye bushings, and both rear shocks).