GENERAL INFORMATION G C 1 t f il it with the information on these pages as well as the general lgcgui gf iwe Pg tsyBook will prove helpful in locating and ordering the desired parts The Book is arranged in sections as follows Model Series Information M Alphabetical Index Chassis Parts Listing Groups 0 000 to 9 000 inclusive GM Manufactured Body Parts Listing Groups 16 000 to 17 999 inclusive Numerical Index The Grouping System for cataloging parts is used as follows Main units of the vehicle are identified by a Numerical value preceding the Decimal i e Engine 0 Cooling and Oiling 1 Electrical 2 Fuel System 3 Some Parts may be cataloged somewhere other than its original or prime group In such listings the pr1me group is indicated in paren hesis This procedure is necessary since a part can have but one identifying Group Number for ordering or bin loca ion For example under Group Number 3 751 Part Number 7020926 is listed as Carburetor C oke Valve Screw and the prime group 3 820 is shown in the description column READING TRUCK CATALOG FORMAT The Truck Models included in this publication are Forward Control Models Forward Control Models will be indicated with a P For further clarification see the Truck Series Identification Charts which follow the General Information Section of the catalog 1991 93 TRUCK CATALOG FORMAT The truck catalog format is written in a similar way to that of the passenger car ca alog using model codes in place of body styles RPO Regular Produc ion Options will a so in most cases be called out in code w description where needed Refer to the RPO list for proper identification of RPO s WHEELBASE when the wheelbase dimension is essential to differentiate between models a 3 digit model number will be used EXAMPLE P314 42 ALL P3 W 157 W B Exc Motor Home Chassis For a full explanation on decoding the model code and wheelbase refer to the truck series identification chart 3 1992 GENERALMOTORSSERVWEPARTSOPERAHONS iTTRUCK 53P 4 9 92