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How to bypass passlock 2 on 2004 impala - Cars & Trucks

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Posted on Jan 02, 2017

tayjoejoe
  • 2184 Answers

SOURCE: 1st is passlock has shut

On a 2002 impala, the switch bypass will not work. The switch bypass originated on the VATS antitheft system which was the predecessor to the system your car has now. Your car has the Passlock system, this system runs off of transponder in your key. On the old Vats system you could read the ohms resistance of the chip in the key, and then recreate that same resistance in the steering column. Thus bypassing the ignition and key. Your system is more complicated. Think about it like this, if a criminal wanted to steal your car, he would rip off the steering column to hot write the ignition. But your car has that anti theft, so it wouldn't start. Wouldn't it be a little too convenient if the Antitheft wires were also right there and all he had to do was twist them together? They learned that lesson on the vats system. Check out this link for info and some "do it yourself" solutions to fix this problem yourself forever. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Sep 10, 2011

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If you mean the "passlock security system" then here is how it is done. Click the link. How To Permanently Disable GM PassLock System

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You can't. Older GM's could bypass the key with a resistor, But it still had to have the security disabled. Yours is I believe a passlock III. You'll have to fix the problem. Could be as easy as a new key and a relearn procedure. Have the codes read.

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Why do think the key security is bad? If you still have a factory key, this is not the problem...if no factory key, you can take your VIN number or original key to GM dealer to get new key that they will program for you...Check for dirty battery connections:)

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1st is passlock has shut down my fuelinjection and cant get car to start 2nd I was told to cut the yellow wire on the ignition swich to bypass passlock allowing me to start my car but How do I get the dash...


On a 2002 impala, the switch bypass will not work. The switch bypass originated on the VATS antitheft system which was the predecessor to the system your car has now. Your car has the Passlock system, this system runs off of transponder in your key. On the old Vats system you could read the ohms resistance of the chip in the key, and then recreate that same resistance in the steering column. Thus bypassing the ignition and key. Your system is more complicated. Think about it like this, if a criminal wanted to steal your car, he would rip off the steering column to hot write the ignition. But your car has that anti theft, so it wouldn't start. Wouldn't it be a little too convenient if the Antitheft wires were also right there and all he had to do was twist them together? They learned that lesson on the vats system. Check out this link for info and some "do it yourself" solutions to fix this problem yourself forever. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Sep 10, 2011 | Chevrolet Impala Cars & Trucks

1 Answer

My 2000 chevy impala starts and runs for a bout 2 seconds. I've been told its the pass 2 security system I tried to bypass that it did not work so since the car has 2000000 thousand miles I thought I...


Well, you wont be able to hotwire it direct. Thats why the Passlock is there. The TDM (theft deterrent module-also called Body control module- or computer) must receive and send the correct signal to let the injectors work. Thats why you car is shutting down. I dont know what you used as a BYPASS, but there is a really great one here that illiminates ALL parts of this system permanently. Read through this link and check out the PERMANENT FIX part. Sounds like this is what you need. Trust me on this one, you will NEVER be able to hotwire that thing, They are wound REALLY tight, and the Passlock system has its fingers in more than just the starter, it allows fuel doors to open, injectors to spray, and sometimes spark in general.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

2000 2001 2002 2003 2004 2005 Chevrolet Impala Passlock Security problem years

tayjoejoe_14.jpg

Jul 08, 2011 | Chevrolet Impala Cars & Trucks

1 Answer

My 2004 impala has full powere but won't start no


When it doesn't start, is the security light and maybe the battery light flashing?

If yes, it's probably the PassLock security system. I just bypassed mine on my 2002 Impala. There are several websites with information and possible solutions; including spending several hundred dollars at the dealer, to a do-it-yourself bypass for a couple dollars.

The best source of information I could find was:
http://www.bergerweb.net/grandamsecurityfix.htm
There is lots of good information there.

If you want to see my writeup on bypassing the PassLock on my Impala, you may have to register at http://www.naioa.com and go to:
http://www.naioa.com/v2/modules.php?name=Forums&file=viewtopic&t=44480

Jun 27, 2011 | 2004 Chevrolet Impala

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I have a 2004 impala that did the same thing..the ignition switch needs to be replaced

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check the battery make sure you have 12v, check all fuse and relays. if all is good get the key repprogramme

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yr gonna have to get the passlock key and punch it into the radio so u can solve ur problem most chevy dealships can assist you with that.

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Passlock


you can bypass the security system entirely. There is a great write-up here http://newrockies.ca. That was the only way to save my Park Avenue.

Jun 17, 2009 | 2003 Chevrolet Impala

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