Foreword

This manual provides information on the diagnosis, the service procedures, the adjustments, and the specifications for the 2003 Alternative Fuels Chevrolet Silverado and GMC Sierra pickup trucks. This manual is a supplement to be used with the 2003 Chevrolet Silverado Pickups, GMC Sierra Pickups and GMC Sierra Denali Service Manual.

The technicians who understand the material in this manual and in the appropriate Dealer Service Bulletins better serve the vehicle owners.

When this manual refers to a brand name, a part number, or a specific tool, you may use an equivalent product in place of the recommended item. All information, illustrations, and specifications in this manual are based on the latest product information available at the time of publication approval. General Motors reserves the right to make changes at any time without notice.

Published by

North American Operations

General Motors Corporation

Warren, Michigan 48090

2002 GENERAL MOTORS CORPORATION

ALL RIGHTS RESERVED

The information cutoff date is 10/27/02.

LITHO IN U.S.A.

No part of this manual 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, and recording) without the prior written permission of General Motors corporation. This applies to all text, illustrations, and tables.