1983 GMC & Chevrolet Truck Dealer Parts Catalog with Illustration Catalog. This Parts Book covers the Medium Duty School Bus Chassis and Forward Control Models. This is what the Dealer used to order Factory Replacement Parts to Repair your Bus or Forward Control. It has Part Numbers, Group Numbers, Description, Quantity and Application with no Illustrations. It is in good condition with minor wear and soiling [see photos]. Very rare and informative piece that will be a valuable tool for the GMC or Chevy School Bus and Forward Control Owner or Collector.