Question about 2002 Chevrolet Cavalier

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2002 chevy cavalier wont shift out of park unless I pull the bcm fuse

Just changed out the ignition tumbler and reprogramed the key anti theft lights go out. will start but wont shift out of park unless I pull the bcm fuse

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  • Chevrolet Master
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The shifter release solenoid is activated by the brake light switch. Check to see if the brake lights are working when you press the brake pedal. If not, that may be the reason why the shifter won't come out of park. You may need to replace or adjust the brake light switch. (It's located at the top of the brake pedal arm).

Posted on Mar 28, 2015

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What most i do when my 2002 chevy avalanche security light keep flashing


Take it to the dealer or a ASE certified repair shop .or go on youtube an check out videos on anti-theft by pass for GM vehicles .There are a few different type's . VATS , pass key 1,2 or three . Being yours is a 2002 model year it isn't the VATS .
Passlock™ System
The theft deterrent system has been incorporated into the body control module (BCM). The theft deterrent is provided in order to prevent the vehicle operation if the correct key is not used in order to start the vehicle. The ignition key turns the lock cylinder. The cylinder rotation produces an analog voltage code in the Passlock™ sensor. This voltage code is received by the BCM. The BCM compares the voltage code to the previously learned voltage code. If the codes match, a class 2 message is sent from the BCM to the powertrain control module (PCM)/vehicle control module (VCM). The message enables the fuel injectors.
The design of the Passlock™ system is to prevent vehicle theft by disabling the engine unless the ignition lock cylinder rotates properly by engaging the correct ignition key. The system is similar in concept to the PASS-Key® system. However, the Passlock™ system eliminates the need for a key mounted resistor pellet. The components of the Passlock™ system are as follows:
• The ignition lock cylinder
• The ignition switch
• The Passlock™ sensor
• The Body control module (BCM)
• The security telltale
• The vehicle/powertrain control module (VCM/PCM)

Feb 18, 2016 | Cars & Trucks

1 Answer

Where is the anti theft system fuse located on 2001 Chevy cavalier


There is no fuse for the anti-theft system ! It receives it's voltage from the BCM . Do you know what a BCM is ? It is a Body control module .
The Passlock?"¢ System is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. If starting is attempted without authorization from the Passlock?"¢ System, the powertrain control module (PCM) will disable engine starting. Start disable may be in the form of fuel disable or starter disable, depending on engine application.
The components of the Passlock?"¢ System are as follows:
?€¢
The ignition lock cylinder and key


?€¢
The ignition lock cylinder case, including the Passlock?"¢ sensor


?€¢
The ignition switch


?€¢
The body control module (BCM)


?€¢
The security indicator on the instrument cluster


?€¢
The powertrain control module (PCM)


The body control module (BCM) contains the logic of the Theft Deterrent System. The BCM provides the battery positive voltage to operate the Passlock?"¢ sensor. The BCM also measures the voltage of the security sensor signal circuit. The voltage measured will indicate whether the Passlock?"¢ sensor has been activated and whether the resistance value from the sensor is a valid value or the tamper value. If voltage measured is in the valid range, the BCM compares this voltage, voltage code, to a previously learned voltage code. If the voltage codes match, the BCM sends a class 2 message containing a password to the powertrain control module (PCM). If the voltage codes do not match, or the voltage is in the tamper range, or there is a circuit fault, the BCM will not send the correct password to the PCM, and the vehicle will not start.
The body control system consists of a BCM and it's associated controls. Battery positive voltage is provided to the BCM from CLSTR fuse in the Fuse Block-left I/P. The module ground is wired to ground G201. The BCM is wired to the Class 2 serial data communication bus as well as discreet input and output terminals to control the functions of the vehicles body !
Now then Karen what problem is your vehicle having , no start an SECURITY light flashing or on solid ?
Now then

Apr 10, 2015 | 2001 Chevrolet Cavalier

1 Answer

Wiring diagram for the ignition switch on a 2000 chevy s10 ?


Unfortunately, you will not be able to do that. The key and tumbler are an intricate part of the vehicles "anti-theft system. If the ignition switch or tumbler is broken it will have to be replaced and the theft code relearned. When the key is turned in the tumbler, the switch reads the key code and sends the code to the BCM. The BCM verifies the code is correct and sends a start message to the ECM and allows the engine to start. With out that code verification, the engine will not start.

Aug 28, 2014 | 2000 Chevrolet S-10

1 Answer

Is there a fee to ask ?


Now and then the gear shifter does not push up all the way to the park position locking up the ignition switch. Try moving the gear shifter up as far as you can to the park position and see if the key's will turn. Your ignition switch is a pass lock system ($$$$) and you don't want to be drilling that out unless you are will to replace it before you try to get the key's to work again. Keep me posted and let me know if that helped, if not i can give you the instructions to removing the ignition cylinder. 

Jul 03, 2009 | 2002 Oldsmobile Alero

5 Answers

How to reset anti theft in 1999 chevrolet cavalier


make sure you have a fully charged battery turn on the ignition with out starting the vehicle let sit in on position for 10 to 15 minute then start it may take a few attempts

Mar 08, 2009 | 1999 Chevrolet Cavalier

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