Expert: INSTALLSUPPORT - 10/31/2007

Question
I have a 2005 Malibu, the Theftlock system disabled the car and I had it towed to the dealership for repairs. It cost $514.00 to get it fixed and the extended warranty didn't even cover it. A few days later the "Theft System" light came on and is staying on. So far it hasn't disabled the car. I will not shell out hundreds of dollars again. It is the original factory system, original keys, the key-lock cylinder has been replaced. I want to know how to completely disable and turn off this system because I don't want this ongoing problem nor do I have money to give away. Who ever engineered this theftlock system at GM didn't do well with it because I'm not the only one with this problem.

Answer
This vehicle has the GM Passlock II 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.

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