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Passlock II Passive Anti-Theft Bypass

The document provides instructions for bypassing the Passlock II anti-theft system on GM trucks from 1998 onwards. It describes locating specific wires in the ignition switch, cutting and splicing one wire, and using a resistor and relays to bypass the system to allow remote starting without the engine immediately shutting off.

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Robinson Guerra
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400 views1 page

Passlock II Passive Anti-Theft Bypass

The document provides instructions for bypassing the Passlock II anti-theft system on GM trucks from 1998 onwards. It describes locating specific wires in the ignition switch, cutting and splicing one wire, and using a resistor and relays to bypass the system to allow remote starting without the engine immediately shutting off.

Uploaded by

Robinson Guerra
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Passlock II passive anti-theft bypass

All GM trucks 1998 & up are equipped with PASSLOCK II security systems. In many ways it is like the PASSLOCK I
system found on the 96-97 Cavalier and Sunfire, but with a few small changes. There is no bulb test wire on the ignition
switch and the measurement for your resistor must be taken with the engine running.

1. Start the car with the key


2. Locate the 3 small wires (YELLOW, ORANGE/BLACK and RED/WHITE) coming from the ignition switch.
3. Separate the wires and cut the YELLOW wire in half.
4. Splice open the ORANGE/BLACK wire but do not cut it.
5. Use a digital ohm meter, attach 1 lead to the ORANGE/BLACK wire and the other lead to the Key side of the
YELLOW wire.
6. Find a resistor of the same value +/- 10 ohms.
7. Wire 2 relays as shown

PLEASE NOTE: This is a fuel cut-off system. If the PASSLOCK II system is not properly bypassed the engine will
immediately shut down after remote start. If this occurs verify that all the wiring is properly connected and that your
resistor is within the allowable parameters.

NOTE: The information on this sheet is provided on an “as is”basis with no representation or warranty of accuracy whatsoever. It is the sole responsibility of the installer to
check and verify any circuit before connecting to it. Only a computer safe logic probe or digital multimeter should be used. Wiremagic.com Corp. assumes absolutely no
liability or responsibility whatsoever pertaining to the accuracy or currency of the information supplied. The installation in every case is the sole responsibility of the installer
performing the work and Wiremagic.com Corp. assumes no liability or responsibility whatsoever resulting from any type of installation, whether performed properly, improperly
or any other way. The information supplied is a guide only.

(c)Copyright 1998 Wiremagic.com Corp. All Rights Reserved.

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