How to Bypass the stupid GM passlock

[Teri]

Any suggestions  >:( >:( >:( >:(

[Fla._Deadheader]

Found out the timing sequence. Starts, for now.  : : : :

  Thanks to the Resident GM Engineer, for helping.  8) 8) 8) 8) 8)

[beenthere]

 ??? ??? ???

[stonebroke]

What's a passlock?

Stonebroke

[Warbird]

Ford's version makes it such that the vehicle will not start unless a pre-programmed key is in the ignition or near it.  Not sure exactly how GM's system works but it is probably similar.

[Don_Papenburg]

Yep It needs the key in the area of the ignition switch.

[Warbird]

Teri,

You may be able to disable it by programming the car itself.  Have you checked your owner's manual or searched on google for your model of vehicle?

The autostart I installed in my car came with a bypass unit for the Ford security system.  It required a key to be put in it, just right, and wires run up to the ignition switch.  Basically, it fakes the existence of a key actually being in the ignition.  I ordered a replacement key from Ford and 'attuned it to the car' (programmed the car to accept that key).  Wiring up a bypass unit like this is not for the faint of heart but it can be done.

[SwampDonkey]

Some of that security stuff can be altered through the radio. Dad's cousin has an Alero and it locks when the doors shut. He's locked himself out several times, keys in the ignition. :D The owners manual says how to alter it, but sometimes it's overwhelming to old codgers that never even programmed an alarm clock before. Then some fella's "don't need to read no manual". ;) :D

[Fla._Deadheader]

 This Pontiac has a solid brass key, not the one with the resistor or "chip". The key has something to do with magnets, that lets the starter turn the engine.

  There is a module behind the dash, that goes bad from lots of starting. There is a "reset" sequence that you have to go through. Takes 10 minutes for the module to "find' itself, and reset. Then, hopefully the car will start.  : :

  It's a security thing  : :

[pigman]

but sometimes it's overwhelming to old codgers that never even programmed an alarm clock before.

You mean an alarm clock can be programmed.   Why would a person program an alarm clock, I just set mine. :-\

[easymoney]

 things get more complicated and expensive. now if you want a spare key for your car you have to go to the dealer and pay big bucks rather than pay a dollar or so to the auto parts store . wonder why so many of us are balking at paying the price for the new  cars and trucks being made today?

[beenthere]

This Pontiac has a solid brass key, not the one with the resistor or "chip". The key has something to do with magnets, that lets the starter turn the engine.

  There is a module behind the dash, that goes bad from lots of starting. There is a "reset" sequence that you have to go through. Takes 10 minutes for the module to "find' itself, and reset. Then, hopefully the car will start.  : :

  It's a security thing  : :

Is this the routine where the key is turned to start, and if it doesn't start, then the key is left on for 10 minutes (not turned off during that time). During that 10 minutes, the anti-theft sensor changes. Then after 10 minutes the car will start by turning the key back to 'start' ? 

[Fla._Deadheader]

Yes, You set the parking brake  : : just a tad, and IF the security light is flashing, it is "searching" for itself  : ;D
Once the flashing stops (10 mins) you turn the key to off, say a prayer or cuss a lil, and try to start the thing.  ;D ;D ;D

  It's easier to just cripple the thieves and stop all this nonsense  : : Wadda I know  : :

[Tom]

What's an alarm clock?

[Woodbender]

Bypassed ours with a little resistor.  Which is all that little chip is in a GM key.  Works like a charm.

[Woodbender]

BTW here's the website describing how to do it.  All you are doing is replacing one resistor with another.  We had a local small business mechanic do this for peanuts.  Not a blip of trouble since.

http://vats.likeabigdog.com/


[edited for spelling]

[Warbird]

Wow, that's interesting.  In a Ford, there is a transponder in the key itself.

[Mooseherder]

Boss,
Sorry, I can't come to work today my passlock isn't working.
Tomorrow ain't looking good either. ;D

[Captain]

OK, GM security system lesson.

Passkey 1 and Passkey 2 have a resistor chip in the key.  Easy to bypass like Woodbender mentioned.

Passkey 3 is a transponder based system, and the most widely used system in current model GM vehicles.  ID with a small PK3 visible on the key, and keys are expensive. ($30-$50)

Passlock has a resistor built into the lock cylinder (NOT the key), with 2 magnets that pass by a hall effect switch internally.  The module monitoring security (could be a Body Controller, IPC, depends on the year/model) ALSO looks for a timing window between these majnets as the cylinder is rotated.  If the signal is present at the wrong time, the security system is activated.  Key replacements are cheap little plain 10 cut brass jobbies available anywhere.

Passkey 3 and Passlock systems require a small module to be installed in the system to mimick the outputs from each respective system.  This is what installers of aftermarket remote start systems do to defeat the system.  Most people with remote starts installed don't realize that their security system has been defeated.  Remote car starters are also the #1 fault of security system issues relating to Passkey(1,2,3) or Passlock.

and FDH, you've got to put "former" in front of that job title now.   

Captain

[Fla._Deadheader]

 Captain, once ya learn it, they can't take it out of you. You are still the resident GM engineer on here, as far as I am concerned.  8) 8)

[york]

Hey guys,

What year did GM start this passlock thing????Does my 2008 have it??

thanks Bert

[Captain]

Mid 90s.  Depending on your model, you can have Passlock or Passkey3.  Identify it by looking at the key for the PK3 or a little circle with a + symbol inside on the key (both signs of PK3)

CAPTAIN