One problem related to brake disc caliper has been reported for the 2001 GMC Sierra. The most recently reported issues are listed below.
Contact owns a 2001 GMC Sierra and there have been a problem with the brakes after the first 5,000 miles o. Tthe brake hit perfectly on the outboard part of the brake, but the in board part of the brake of each brake is only hitting about 15 percent. Upon inspection the brake pad wore out very little. By appearance, it a inside caliper was not milled square to the other side of the caliper, causing the brake pad not hit squarely on the rotor. The service dealer tested the vehicle and stated there was no recall on t and that the rotor was warped.