Expert: INSTALLSUPPORT - 11/27/2007

Question
QUESTION: hi       i recently bought a 1998 grandam that does not have the switch in it   i can crank it with a screwdriver and it will stay running for a few seconds then it will cut off due to the anti theft system i was wondering if there is a wire that i can cut to eliminate this         thanks  jackie

ANSWER: Not as easy as that I am afraid.

This vehicle has the GM Passlock I immobilzer
anti-theft system. A bypass is required to circumvent.
If left unchecked, it will lock down the fuel injector
rail, and you will need to tow it in to GM for
evaluation, and resetting.

I suggest the PLJX bypass kit to get around
this issue for good.

This Passlock Bypass Module is designed to momentarilly
allow the engine to remote start by sending a proper
coded pulse to open the fuel rail passlock injector
cut off circuit.

The output from an alarm/remote starter
would then shut down the pulse, once it has detected
the engine has engaged, and preserve the integrity
of the passlock system.

That is it's designed purpose.

However, in your case, this input wire on the PLJX module,
instead of going to a momentary ground pulse from
an alarm/remote starter,
would go to a constant chassis ground, through
the bypass module, grounding out the PASSLOCK.
The PASSLOCK would then always be bypassed as long
as that wire is chassis grounded.

I can not speak about a damaged passlock system,
like if a thief has destroyed it, because I do not
get into this part of GM'S security application.
But as a happy coincidence to installing
after market remote starters, this does work on bypassing
passlock in most all GM vehicles we've run into,
including your year GM vehicle as well.

Also, this is a self learning, resistor sensing
and adjusting module. Once the VATS wires have been tapped,
you would press the program button to learn,
and it does. The car should then allow start
with any hardware store key.

Hopefully, it will on yours as well.

You might want a car alarm installer to do this
for you, the fair rate being around 50. to 75.
for labor.

Kind Regards,

Robert Martin-ALARMTEK/CEO
Master Technician
Mobile Security Electronics
www.PASSLOCK2.com

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---------- FOLLOW-UP ----------

QUESTION: hi again i ordered and had installed the bypass module you recomended the car cranked and ran great for about two weeks went to the store cut the car off when i came back and went to start it the antitheft light is blinking again and once again it would only stay running for about a minute then shut off the antitheft light blinks again what do you recomend

Answer
Have the tech redo it I'd imagine.
I can't think of any reason it would not
continue to work.

So, the best idea here is to re check the
work done, and try that again.

If the PASSLOCK is damaged in any way, there could
be other issues, but again, no idea what's
what in there causing it to stop now,
if it was fine for the past 2 weeks
without inspection.

For direct service support on this module
call 1800 780-1409 and speak to Ryan for trouble
shooting.

ALARMTEK