D C N ll I A C 1 9 7 6 IB 1 PA R I S GATA LO G lMPORTAN ll Passenger vehicles for 1976 81 contain many parts dimensioned in the metric system These parts ere very close in dimension to familiar customary measurements in the inch system lt 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 climensions However since the same vehicle may be built with metric or customary fasteners care should be exertzizsed in selecting repllacement 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 A special Service Parts Operations label saying Metric Fasteners Required in red letters will be used to identify service parts which require metric fasteners but replace parts wlnich originally used inch fasteners This label will enable dealers and over the counter customers to quickly recognize parts which have changed to metric fasteners 15987 GENERAL MOTORS CORPORATION ALL RIGHTS FIEEEQERVED NO PART OF THIS PUBLICATION MAY BE REPRODUCZED STORED IN ANY RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS INCLUDIING BUT NOT LIMITED TO El ECTRON C MECHANICAL PHOTOCOPYING RECORDING OR OTHEFlW S lE WITHOUT THEE PRIOR WRITTEN PIERMISSION OF GENERAL MOTORS CORP THIS INCLUDES ALL TEXT ILLUSTRATIONS TABLES AND CHARTS REQUESTS FOR PERMISSIOIN lES IOUI D BE SENT TO General Motors Service Parts Operations 6060 West Bristol Roacl Flint MI 48554 Engineering Department 3640 J U LY ll JEI7 PONTIAC 21 PRINTED IN U S A