INTRODUCTION This Parts Catalog has been compiled for the purpose of locating identifying and ordering replacement parts All data and specifications contained in this publication are based on the latest product information available at the time of printing General Motors Service Parts Operations reserves the right to make changes at any time without notice in data price specifications materials and model T e List Prices shown are suggested prices only for sales to consumers Replacement parts are listed in this catalog under 16 major groups as shown on the content Rage Individual parts are assigned a Prime Group number the first numeral of t e group identifies the main unit it is affiliated with and following the decimal is the Sub Group number under which all parts of the same name and function are listed For example Group 0 519 Camshaft The O denotes that it is an Engine Part 519 the sub group where all Engine Camshafts are listed Related parts may also be found in the same group Within each group parts are listed by model year vehicle series part number number used per vehicle or R H L H designation suggested list price part name and description Parts may be used in different locations on the car requiring the listing of the part number in more than one group When this Cross Referencing occurs the prime group is shown in brackets i e 1 850 in the description column To locate a listing for a part determine the model vehicle and refer to the group number identifying it which may be determined by using any of the follow ing methods A When the name of the part is known consult the ALPHABETICAL INDEX which lists parts by noun name and Group Number where part is listed B Reference may be made to the ILLUSTRATION CATALOG where Group Numbers noun names or part numbers are shown C When a part number is known and model application or a similar part is re quired consult the DEALER PRICE SCHEDULE for the Group Number to locate the part in the Parts Catalog Parts having application or used with ogtional equipment are identified by Option Number or abbreviation of option Fami iarity with Option Numbers will assist in determining correct part required Complete identification for models and options listed in this catalog will be found preceding the alphabetical index Service part numbers are assigned to individual parts that make up an assembly used in the production of models Certain items may not be listed such as s ort tubing parts or fuel lines that can be made up by dealers from bulk material or attaching parts may be included in packages with the major assembly and not list ed separately Right Hand and Left Hand parts are so designated from the driver s position when seated in the car 1990 GENERAL MOTORS SERVICE PARTS OPERATIONS PONTlAC 22W 4 REV 6 90