Question about 1999 Chevrolet Silverado 1500

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Was wondering how to disable passlock on my 99 chevy silverado?

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Go to bulldogsecurity.com on the left there is info on bypass security systems it tells you to go to a web site and purchase a bypass module

Posted on Mar 05, 2009

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Passlock Security system... - Discussion on Topix




Jan 16, 2016 | 2003 Chevrolet Impala

1 Answer

How to program key to ignition for a 1998 Chevy truck w/vortex v6 engine..I tried it myself an it did crank but will not stay running


Program KEY ? There is no transponder in the key for a 1998 Chevy truck . What problem are you have ,no start ? Is the SECRUITY light lit on the dash ? you don't need to program keys with this ant-theft system .
Vehicle Theft Deterrent (VTD) Operation
The design of the passlock system is to prevent the vehicle operation if the proper ignition key is not used in order to start the vehicle. The mechanical key, in normal operation, will turn the passlock lock cylinder. The passlock sensor will relay the passlock data to theEVO/Passlock module. The EVO/Passlock module will determine the validity of the passlock data. The EVO/Passlock module will send a code password to the vehicle/powertrain control module (VCM/PCM). When the VCM/PCM receives the correct code the VCM/PCM allows the fuel injectors to operate normally. The passlock system requires the VCM and the EVO/Passlock module to communicate the various functions in order to operate. These functions transmit over the class 2 serial data line CKT 1807. For an explanation of the class 2 serial data operation refer to Data Link Communications Circuit Description in Wiring Systems.
Passlock System
The design of the passlock system is to prevent vehicle theft by disabling the engine unless the passlock lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the passkey system. However, the passlock eliminates the need for a key mounted resistor pellet. The components of the system are as follows:
?€¢
The ignition lock cylinder


?€¢
The ignition switch


?€¢
The passlock sensor


?€¢
The EVO/Passlock module


?€¢
The security indicator


?€¢
The vehicle/powertrain control module (VCM/PCM)

Nov 29, 2015 | Cars & Trucks

1 Answer

Does a 2006 chevy silverado have a coded ignition?


Yes, it is a Passlock system. Here are a couple of links. One for a relearn procedure, and another for troubleshooting failure and bypassing if needed.

http://support-docs.newrockies.com/20032006_suburban_tahoe_yukon_silverado_v4_

http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sep 19, 2014 | 2006 Chevrolet Silverado

1 Answer

Have 99 chevy silverado 1500 I have a headlight problem all the other lights work but headlights won't turn on


-Check "headLight fuse"
-Check connector at the headlight.
-Check the bulb. (It could burn out)

Mai

Apr 03, 2013 | 1999 Chevrolet Silverado 1500

1 Answer

How to disable passlock system on 2000 Chevrolet 2500 series truck,the security lights stays on continuosly


There isnt any way to disable it that I know of, if you could, anybody could steal the car. It just needs to be fixed by a qualified repair shop or the dealer.

Nov 23, 2009 | 2001 Chevrolet Silverado 2500HD

1 Answer

Problem starting my 2002 Chevy Malibu because of the Passlock anti theft system. How do I disable the passlock system so I don't have problems starting my car.


the only way to get by this is to install a remote starter had the same problem with my grand am it worked no more problem.

Jun 04, 2009 | 1998 Chevrolet Malibu

2 Answers

Gm passlock security system how to disable


Wiring diagrams can be found online, however i believe you can re-learn the key by leaving it inside the ignition tumblen and switch it to accesory. Then disconnect the b attery for about ten minutes and then try starting the car without taking the key out.

May 03, 2009 | Chevrolet Monte Carlo Cars & Trucks

2 Answers

2006 chevy colorado passlock comes on and stays on, truck won't start for 10+ min. Can I disable this feature?


No, it can not be disabled.
The theft system is indicating a short term theft issue.
Have you added any "after market" remote start systems or alarms?
If NO.
Insert the key in the ignition, turn the key to run position ( do not start ) and leave it in that position for 10 minutes. Cycle the key to LOCK position, count to 10, then turn the key back to run position and leave on for 10 more minutes. After the 10 minutes is up, repeat the procedure (1) more time and the security system will relearn the PASS code.
Give it a try and let me know.
Regards,

Mar 23, 2009 | 2006 Chevrolet Colorado

1 Answer

Passlock


The black should be ground, The orange should be 12 volts, there should be another wire. Yellow? signal wire.

Feb 19, 2009 | 2000 Chevrolet Blazer

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