S r 1 y 1982 1990 q ST LIGHT TRUCK PARTS AND ILLUSTRATION CATALOG EFFECTIVE OCTOBER 1990 All illustrations and specifications contained in this literature are based on the latest product T information available at the time of publication approval General Motors Corporation reserves the right to make changes at any time without notice in colors materials equipment specifications and models and A also to discontinue models g IMPORTANT Light Truck vehicles for 1982 90 contain many parts dimensioned in the metric system These parts are very close in dimension to familiar customary measurements in the inch system It is important that during any vehicle maintenance procedure replacement fasteners have the same measurements as those removed whether metric or customary Mismatched or incorrect fasteners can result in vehicle damage or malfunction or possibly personal injury Fastener sizes denoted on illustrations may not reflect metric dimensions However since the same vehicle may be built with metric or customary fasteners care should be exercised in selecting replacement part equivalent to the original fasteners in dimensions strength and pitch of thread Both metric and customary fasteners required for replacement are listed in the Service Parts Operations Standard Parts Catalog 89 A special Service Parts Operations Division label saying Metric Fasteners Requ1red in red letters will hh be used to identify service parts which require metric fasteners but replace parts which originally used inch fasteners This label will enable dealers and over the counter customers to quickly recognize parts which have changed to metric fasteners h V 1990 GENERAL MOTORS CORPORATION h ALL RIGHTS RESERVED NO PART OF THIS PUBLICATION MAY BE REPRODUCED STORED IN ANY RETRIEVAL SYSTEM OR x TRANSMITTED IN ANY FORM OR BY ANY MEANS INCLUDING BUT NOT LIMITED TO A ELECTRONIC MECHANICAL PHOTOCOPYING RECORDING OR OTHERWISE WITHOUT THE PRIOR WRITTEN PERMISSION OF GENERAL MOTORS CORP THIS INCLUDES ALL TEXT ILLUSTRATIONS TABLES AND CHARTS L REQUESTS FOR PERMISSION SHOULD BE SENT TO I GENERAL MOTORS SERVICE PARTS OPERATIONS 6060 West Bristol Road 1 Us L Flint MI 48554 A Engineering Department 3640 r L GENERAL MOTORS SERVICE PARTS OPERATIONS A 1 TRUCK PARTS PUBLICATIONS DEPARTMENT WATERFORD MI 48329 LIGHT TRUCK 52S 1990 GENERALMOTORSSERWCEPARTSOPERARONS lTTRUCK 525 REV 10 90 1