INTRODUCTION J This ILLUSTRATION CATALOG has been compiled to assist in the location and identification of service parts The illustrations herein may not always show the exact part re I quired however for identification purposes the group number or noun name can be readily located from an view covering a typical illustration I The layout ofthe information contained in this publication is such that the illustrations can be removed for combining with the Chassis and Body Parts Catalog Sections by groups The sing e catalog concept can be maintained using this system or the sepa rate Illustration Catalog and Parts Listings Catalogs can be used I During each calendar year complete reprints of the catalog are published as part of the Catalog Revision Service New or revised illustrations are mailed to dealers subscribing to the revislon ser I J vice as they are scheduled l All specifications and illustrations contained in this publication are based on the latest product information available at the time of printing General Motors Parts Division reserves the right to make cha nges at any time without notice in data specifications mater ial and models Due to Engineering and or part number changes all part number application herein should be verified by refering to the Parts Catalog J GM PARTS DIVISION GENERAL MOTORS CORPORATION I BUICK 40A I 4