GENERAL INFORMATION This Master Parts Book contains standard and optional parts for F G J N S T X Y Series GMC Truck Models Book is arranged in following sequence Description Page Group Index 1 General Information 2 IM P O N T Regular Production Options 3 R E To Locate Parts Information 4 Telegraphic Code 5 T H I S Decimal Equivalents and Abbreviations 6 t Replacement Page Service 7 PA G E Serial Number Locations 8 9 Truck Model Identification 11 Text Group 1 thru Group 23 Numerical Index Alphabetical Index Illustrations other than standard parts and charts have been omitted Refer to P SM 165 for exploded drawings Major listing of parts is shown starting on page 1 1 This major grouping is the same in all Parts Books Maintenance Manuals Flat Rate Books and other service literature Group Index on page 1 shows sequence of units First page of each group has black tab for quick reference Each major group is divided into subgroups of related parts Parts in a subgroup are arranged alphabetically with a detail group number for each description Main part in subgroup and kits or sets appear first and are not arranged alphabetically Part numbers removed or replaced in Replacement Page Services will appear in the RP replacement book The replacing part in the text will show Replaces RPO Regular Production Option parts are identified by description No reference to RPO number is shown Separate RPO lists released in loose leaf form must continue to be used for installation purposes 3