Good original 1999 Chevrolet, Cadillac and GMC Dealer Service Manual Set [Volumes 3 & 4 ONLY].  These Manuals cover the CK Truck Models [ Pickup, Suburban and Utility ]. These were used by the Dealership to Service and repair your Truck. They include information, specifications, procedures, illustrations, diagrams and trouble shooting for your vehicle. Very informative and useful tool that is hard to find since they were not available to the public.  Good used condition with normal wear, blemishing and soiling from use in a Dealership [see photos]. This set does NOT include Volumes 1 & 2, it only has Volumes 3 & 4 which cover Engine, Transmission/Transaxle and the Body & Accessories.