The GM Tech2 User’s Guide provides a comprehensive overview of the GM Tech 2 scan tool.
Everything contained in this manual is based on the latest product information available at the time of
publication. The right is reserved to make changes at any time without notice.
No part of this publication may be reproduced, stored in any retrieval system, or transmitted in any form
by any means, including but not limited to electronic, mechanical, photocopying, recording, or otherwise,
without the prior written permission of GM Service and Parts Operations. This includes all text, tables,
illustrations, and charts.
To obtain assistance with a question or problem concerning the operation of your Techline product and its
attached products, or to arrange for warranty and non-warranty repairs, telephone the GM-Techline
Customer Support Center. To order replacement parts, contact GM Dealer Equipment or your customer
support representative for GM-Techline.
The GM Tech 2 has been designed as a rugged, shop-ready tool by having:
• A sturdy case
• A sealed keypad
• Heavy-duty cables and connectors
You can expect years of trouble-free service if you take reasonable care of the Tech 2 and follow the
maintenance procedures outlined in Section II.
The Tech 2 can be powered from:
• The automobile battery power cable
• The cigarette lighter power cable
• The Tech 2 power supply
• The DLC (Data Link Connector) connection in most vehicles
The GM Tech2 contains electronic components called PCMCIA (Personal Computer Memory Card Industry
Association) cards, which store diagnostic programs. The Tech 2 can be updated as vehicle models
change by reprogramming the PCMCIA card via the RS-232 connector.
The GM Tech 2 is warranted against defects in materials and workmanship by the manufacturer for 24 months
beginning five days after the date of shipment to your service center.
If your GM Tech2 must be sent in for repair, a replacement will be sent to your dealership prior to the return of
the failed Tech 2. Use the package that the replacement arrives in to return the defective unit. You can
contact Customer Support at 1-800-828-6860 for the exact exchange procedure. If notification of defect is
received during the warranty period, the part listed in figures I-2, I-3, I-4, or I-5 that is defective will be
replaced. You must return the defective unit as directed, or you will be charged for the replacement.
Important: This warranty does not cover any part that has been abused, altered, used for purpose other
than which it was intended, or used in a manner inconsistent with instructions regarding use. This
includes, but is not limited to, removal of any Tech 2 screws
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