GENERAL MOTORS issued a recall on the SIERRA, and SILVERADO models

On certain vehicles, rear axle shafts may not have been properly heat treated. An improperly heat-treated axle shaft could fracture without warning near the hub flange resulting in separation of a rear wheel from the axle shaft, increasing the risk of a crash which may result in injury and/or property damage. Correction: Dealers will inspect the manufacturing code on rear axle shafts and replace those identified as defective.