l c x GENERAL INFORMATION Complete familiarity with the information on these pages as well as the general layout of the Parts Book will prove helpful in loca ing and ordering the desired yl 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 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 V Engine 4 0 cooling and Oiling 1 Electr cal 2 Fuel system 3 Some Parts may be cataloged somewhere other than its original or prime roup In such listings the pr me group is indicated in paren hesls procedure Qs necessary since a part can have but one identifying Group Number for ordering or bin loca lon For example under Group Number 3 151 Par Number 1020926 is listed as Carburetor C dke 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 0 or R nven ona Mo e s w W ee Dr ve w be nd cated w t a K or V Co ti 1 d l ith 4 h l l ill l l 1 h For further clarification see the Truck Series Identification Charts which follow the General information Section of the catalog TRDCK CATALOG FORMAT T The 1985 90 truck catalog format is written in a similar way to that of the passenger car catalog us ng 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 HP0 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 Blazer Jimmy Only cK109 03 All CK1 w 131 5 W and Cab 2 Door CK209 43 All CK2 w 164 5 w B and CaB 4 Door EXAMPLE Rv1 5 Blazer Jimmy Only RVl09 503 All RVl w 13 5 II and Cab 2 Door Only Rv209 43 All RV2 w 164 5 w B and Cab 4 Door ISBO GENERALMOTOHS SERVICE PARTS OPERATIONS LTTRUCK SIR 4 REV 9 90