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 The Group System of listing parts is used and briefly as follows i Main units of the vehicle are identified by a Numerical value preceding the Decimal gi e Engine 0 Cooling and Oiling 1 Electrical 2 Fuel System 3 Some Parts may be listed elsewhere than in its original or prime group and in such listings the prime group is indicated in parenthesis procedure is necessary as 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 follows Conventional Models will be indicated with a C or R Conventional Models with 4 Wheel Drive will be indicated with a K or V For further clarification see the Truck Series Identification Charts which follow the General Information Section of the catalog 1985 88 TRUCK CATALOG FORMAT The 1987 88 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 1 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 CK105 V Blazer Jimmy Only CK109 03 All CKl w 131 5 W B and Cab 2 Door CK209 43 All CK2 w 164 5 W B and Car 4 Door EXAMPLE RV105 Blazer Jimmy Only RV109 03 All RV1 w 131 5 W B and Cab 2 Door Only RV209 43 All RV2 w 164 5 W B and Cab 4 Door 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R REV 1 88 5