CHAFIT INFOFIMATIONI PA lEliEJS CHART DEESIGN The charts are designed to list all items which are details of the Nlajor Assemblies listed inumerically at the top of the chart pages Major Groups may contain more than one chart Please note each chart has a description header which identifies the major assemblies listed and the text group they are found in example Wheels Front lj rum Hub Wheel 5 307 The text group lists Major Assemt Iies with applicable dlescription model and year usage Service notes are provided to guide proper location of service parts Parts used in conjunction with Major Assemblies and are not listed as details are located lo the appropriate text group l la ng on or loose itemsl TO LOCATE P ART1El l lajor Assemblies must be known Please refer to major assembly identification aids vehicle serial number plate truck broadcast sheet service parts identification label major component part number label lvlajor Assembly parts tzlook group l lajor Assembly details are listed alphabetically in a vertical chart form by line number Each line has one descnptiori only and includes Gl lT and WDDGM group numbers for reference General Motors usestwo differentgrouping systems tor truck parts books The Gl IT system is used tor all heavy duty model parts books and the WlfjlDGl l system for the medium duty model books Please refer to the General information Pages for detailed parts group usage information IF NOUN NAME IS NCllT I L O WN Refer to the illustration Catalog keeping in mind the l lajriir Group number and described area Locate the appropriate illustration and delerrnine the part required on the illustration The noun name and group nurnber is listed in the legerld Please refer to the llIustration Catalog Introduction pages for additional user ll l ICllim El l IOlTl IF NOUN NAME IS KI lO lNI I Peter to the Alphabetical Index as guide to identity group number Please note lf the group number is not found ln the text the group is charted Scan down the chart lines and locate noun name using group number as a guide Description and or usage is also provided to assist identification Locate the l lajor Assernblyl part number at the lop ol the chart and scan down to tine number of the parts noun name In this box you will find the quantity required part number and vendor oornber or note 7 1 CHART