GENERAL INFORMATION Complete familiarity with the information on these pages as well as the general layout of the Parts Book will prove helpful in locating and ordering the desired parts The Book is arranged in sections as follows Model Series Information 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 Graphics groups 0 000 to 18 000 inclusive 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 i Cooling and Oiling 1 Electrical 2 Fuel System 3 Some Parts may be cataloged somewhere other than its original or Erime group In such listings the prime group is indicated in parenthesis T is procedure is necessary since a part can have but one identifying Group Number for ordering or bin location For example under Group Number 3 751 Part Number 7020926 is listed as Carburetor Choke 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 listed as G Forward Control G Models Forward Control Cab Van Chevy Van and Vandura Models will be indicated with a G For further clarification see the Truck Series Identification Charts which follow the General Information Section of the catalog TRUCK CATALOG FORMAT The 1985 91 truck catalog format is written in a similar way to that of the passenger car catalog using model codes in place body styles RPO Regular Pro duction Options wil also 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 For a full explanation on decoding the model code and wheelbase refer to the truck series identification chart The following is a list of all the body codes G 03 Cab Van Chassis Hi Cube Van Magna Van G 05 Chevy Van Vandura Caravan Gypsy Van Nomad Gaucho G 06 Sport Van Rally Wagon Beauvi le Rally STX G 32 R V Cutaway Van I f 1991 GENERAL MOTORS SERVICE PARTS 0PERATl0NS LTTRUCK 52G 1 4 1 91