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Pontiac Repair/Security/Anti-Theft Module


Hey Todd,

The wife's 01 Grand-Am's security module is acting up.  Periodically it goes into lock-out mode (at the most inconvenient times of course).  After the dash light stops flashing (10 mins) it fires up and and she's OK for a week or two.  The local wrecker wants $18.00 for a used one with a 90 day warranty so I want to try that approach 1st.
Question, where is this located, what does look like and what is the "re-learn" procedure to adapt the used one to my wife's car.


Hi Colin:

it could bea few things the BCM which is the theft module on this car could be getting water in it. the HVAC module leaks water onto the module and causes issues. the BCM is loacted under the hvac module under the glove box. I would check the 3 connectos there to make sure there is no corrosion in them. if they are clean then chances are it just needs an ignition lock housing assembly. the sensor in the module goes bad. DO NOT GET A USED one of those. as for the BCM they are not reusable once they have the VIN set in them from the car they are in they will only work in that car they can not be used in another one. the sensor in the lock hosuing skews hi or low and the BCMN doesn't like what it sees so it will not allow the car to start. when you relearn it your learning it to the new swewed reading it's good untill that readin skews some more and they your stuck again. good luck :-)

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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