System: equipment; other pieces; trailer hitches and attachments.vehicle description: light duty 4 door multi-purpose vehicles equipped with a weight distribution trailer hitch (VR4) option.note: if your vehicle IS presented to an authorized dealer on an agreed upon service date and the remedy IS not provided within a reasonable time and free of charge or the remedy does not correct the defect or noncompliance, please contact chevrolet service center at 1-800-222-1020 or GMC at 1-313-456-4547. Also, contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.