New Reproduction 1963 GMC Truck Dealer Service Manual Supplement. This Shop Manual Supplement X-6323 was meant to be used with the 1962 Truck Manual X-6223 for Full Coverage. This is what the Dealer used to service and repair your Truck. It covers the Models 1000 thru 5000 [Except "P/PB" Models] "G" Series and "J" & "N" Series Built After September 4, 1962. [Does not cover Vans or Route Vans]. It has information, specs, diagnostic tips, procedures and illustrations to aid in the repair of these Trucks. Very informative and useful tool for the GMC Truck Owner.