Old b I I 1976 81 t CA I ALOG g IMPORTANT A Passenger vehicles for 1976 81 contain many parts dimensioned in the metric system These parts are very close in I 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 fas1 eners 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 an d pitch of thread Both metric and customary fasteners required for replacement are listed in the Service Parts Operations Standard Parts Catalog I A special Service Parts Operations label saying Metric Fasteners FIequired in red letters will 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 1987 GENERAL MOTORS CORPORATION ALL RIGHTS RESERVED NO PART OF THIS PUBLICATION MAY BE REPRODUCED STORED IN ANY RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS INCLUDING BUT NOT LIMITED TO ELECTRONIC MECHANICAL PHOTOCOPYING RECORDING OR OTHERWISE WITHOUT THE PRIOR WRITTEN PERMISSION OF GENERAL MOTORS CORP THIS INCLUDES ALL TEXT ILLUSTRATIONS TABLES AND CHARTS REQUESTS FOR PERMISSION SHOULD BE SENT TO t General Motors Service Parts Operations 6060 West Bristol Road Flint Ml 48554 I I Engineering Department 3640 JULY 1987 OLDSMOBILE 31A PRINTED IN U S A