One problem related to axle hubs has been reported for the 2001 Chevrolet Blazer. The most recently reported issues are listed below.
Possible quality issue with gm hub/bearing part number 12413045. Purchased vehicle with 21,500 miles on it. On 3/23/05 at 57,468 miles, the right front hub/bearing assembly went bad. Gm part 12413045. On 4/27/05 at 60,750 miles, left front hub needed replacement. Now, on 2/16/06, at 90,650 miles, left front hub needs replacement. That is less than 30,000 miles. Chevrolet dealer denied claim that product defective in any way. Would like to have gm acknowledge problem with premature wear and replace at no cost.