GENERAL MOTORS issued a recall on the SIERRA and SILVERADO models

On certain 3500HD vehicles, the tapered hole in the drag link end that attaches to the pitman arm tapered ball stud may be machined too deep causing the hole to be oversized. A drag link with an oversized hole may not "seat" the pitman arm tapered ball stud when assembled. This could cause higher than normal friction between components during operation, and over time, result in a joint separation or a broken ball stud. If the joint separated or the ball stud broke while the vehicle was moving, steering control would be lost and a vehicle crash could occur without prior warning. Correction: Dealers will inspect the steering linkage assembly, and if necessary, replace the drag link and pitman arm.