I need to program a PK3 key for 2002

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AV41Medic:
Is there a way to program a PK3 key for 2002 Montana besides taking it to a dealer and being charged an hour labor?? :E:

sperry:
Does the key say "PK3"? Then proceed:

PassLock III
Vehicle Theft Deterrent (VTD) Description and Operation

The vehicle theft deterrent (VTD) system functions are provided by the theft deterrent control module. When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge, if the calculations match the theft deterrent control module sends the fuel enable password via the serial data circuit to the powertrain control module (PCM). If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the PCM via the serial data circuit. The components of the VTD system are as follows:

    * Theft deterrent control module
    * Powertrain control module (PCM)
    * Ignition key (Transponder)
    * Ignition lock cylinder
    * Security indicator

Theft Deterrent Control Module

Vehicles with steering column mounted ignition switches have the exciter integral with the theft deterrent control module which is located within the steering column. Vehicles with instrument panel mounted ignition switches have exciter modules separate from the theft deterrent control module with the vehicle wiring harness connecting the two. The theft deterrent control module for vehicles with instrument panel mounted ignition switches is located within the instrument panel. The theft deterrent control module can learn up to ten keys (transponder values).

The theft deterrent control module uses the following inputs, battery voltage, ignition switched voltage and ground circuit. The theft deterrent control module uses the following outputs, password exchange with the PCM, fuel enable/disable via the serial data circuit.

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the head of the key is energized by the exciter coils surrounding the ignition lock cylinder. The energized transponder transmits a signal that contains its unique value, which is received by the theft deterrent control module. The theft deterrent control module then compares this value to a value stored in memory, learned key code. If the value is correct the theft deterrent control module sends a random generated number to the transponder, this is called a challenge. Both the transponder and the theft deterrent control module perform a calculation on the challenge. The theft deterrent control module then performs one of the following functions:

    * If both the transponder value and the calculation to the challenge are correct, the theft deterrent control module will send the fuel continue password to the PCM via the serial data circuit.
    * If either the transponders unique value or the calculation to the challenge is incorrect the theft deterrent control module will send the fuel disable password to the PCM via the serial data circuit.
    * If the theft deterrent control module is unable to measure the ignition key transponder value for one second due to a damaged or missing pellet or a damaged exciter, the theft deterrent control module will send the fuel disable password to the PCM via the serial data circuit.

Powertrain Control Module (PCM)

The PCM verifies that the password received from the theft deterrent control module via the serial data circuit is correct. The PCM can learn only one fuel continue password. If the fuel continue password is correct, the PCM enables the starting and fuel delivery systems.

The PCM disables the starting and fuel delivery systems if any of the following conditions occur:

    * The fuel continue password is incorrect.
    * The fuel disable password is sent by the theft deterrent control module.
    * No passwords are received - there is no communication with the theft deterrent control module.

The Ignition Key (Transponder)

The ignition key on vehicles equipped with the passkey III+ system is a typical looking ignition key with a transponder located in the plastic end of the key. The transponder value is fixed and unable to be changed. The VTD system uses the ignition key transponder value to determine if a valid ignition key is being used to start the vehicle. There are approximately three trillion possible transponder values. There are no visible electrical contacts. The keys may be identified by the letters PK3+ stamped into the steel shank of the key. The VTD systems use the following types of ignition keys:

Master Keys

Master keys have a black plastic end are for full access operation of the vehicle. Master keys may perform the following functions:

    * Start the vehicle.
    * Lock/unlock all of the door locks.
    * Lock/unlock all of the storage compartments.

Ignition Lock Cylinder

The ignition lock cylinder performs all of the functions of a lock cylinder on a non PK3+ equipped vehicle. The ignition lock cylinder for vehicles with PK3+ may be located on the steering column or on the instrument panel. In either location the exciter coils surround the ignition lock cylinder such that they are very close to the head of the key which contains the transponder pellet.

If an ignition lock cylinder is replaced, the PK3+ keys must match the mechanical coding of the new lock cylinder. When replacing an ignition lock cylinder, and new PK3+ keys are required, refer to Programming Theft Deterrent System Components .

SECURITY Indicator Operation

The theft deterrent control module can command the instrument cluster to illuminate the SECURITY indicator only when the ignition key is in the ON position. If the PCM loses communication with the theft deterrent control module, the instrument cluster will also detect the loss of communication and will illuminate the SECURITY indicator. The SECURITY indicator can indicate both malfunctions, Indicator on steady and tamper, Indicator flashing. A flashing indicator indicates unauthorized operation. Under the following conditions the SECURITY indicator may be commanded to illuminate.

SECURITY Indicator Illuminates when Engine is Running

If the theft deterrent control module is unable to measure the ignition key transponder value or the PCM loses communication with the theft deterrent control module while the engine is running, the indicator will be illuminated.

SECURITY Indicator Illuminated and Engine Does Not Start

If the theft deterrent control module was unable to measure the ignition key transponder value or the PCM has detected a problem with the theft deterrent system. The VTD system is in Learn Mode. ->Refer to Programming Theft Deterrent System Components .<- Passlock III: "Documentation does not exist for the 2002 Pontiac Montana."

SECURITY Indicator Flashes and Engine Does Not Start

The theft deterrent control module has measured an incorrect transponder value, the calculation to the challenge is incorrect or the PCM has lost communication with the theft deterrent control module, The VTD system considers this a tamper condition. The VTD indicator will flash.

     Document ID# 827879

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HTH!

sperry:
Passlock III Programming: REQUIRES DEALER EQUIPMENT!

Programming Theft Deterrent System Components
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Important

When replacing a theft deterrent control module with a GM Service Parts Operation (SPO) Replacement Part, the procedure to setup a new theft deterrent control module must be performed prior to the 10 Minute Re-Learn Procedure.

Tools Required

Tech 2 diagnostic scan tool

Procedure to setup a New Theft Deterrent Control Module

Use this procedure only if replacing the theft deterrent control module with a GM Service Parts Operation (SPO) Replacement Part.

   1. Connect the Tech 2 diagnostic scan tool to the vehicle.
   2. Turn ON the ignition , with the engine OFF.
   3. With the scan tool, select Setup New VTD Module in the Vehicle Theft Deterrent, Special Functions data list.
   4. Follow the scan tool on screen instructions.

Important

    * When replacing a theft deterrent control module with a GM Service Parts Operation (SPO) Replacement Part, the module will learn keys immediately. The existing PCM however, must learn the new fuel continue password when the theft deterrent control module is replaced.
    * When replacing a powertrain control module (PCM) with a GM Service Parts Operation (SPO) Replacement Part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a relearn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the fuel continue password of the other vehicles theft deterrent control module and will require performing the 10 Minute Re-Learn Procedure to learn the fuel continue password of the current vehicles theft deterrent control modules .
    * When performing the 10 Minute Re-Learn Procedure, all previously learned keys will be erased from the theft deterrent control module's memory.
    * Additional keys may be learned immediately after the 10 Minute Re-Learn Procedure. Refer to Adding Keys .
    * When performing the 10 Minute Re-Learn Procedure, 2 master passkey III+ (PK3+) keys are required. If a gray valet key is learned first, the theft deterrent control module will not allow additional keys to be learned.

Tools Required

    * Tech 2 diagnostic scan tool
    * Techline Terminal with current Service Programing System (SPS) software

10 Minute Re-Learn Procedure

Use this procedure after replacing any of the following components:

    * The passkey III+ (PK3+) keys
    * The theft deterrent control module
    * The PCM, see Important above

Important

If replacing a theft deterrent control module with a GM Service Parts Operation (SPO) Replacement Part, insure the procedure to setup a new theft deterrent control module has been performed prior to the 10 Minute Re-Learn Procedure.

   1. Connect the Tech 2 diagnostic scan tool to the vehicle.
   2. With the scan tool, select Request Info. under Service Programing System and follow the scan tool on screen instructions.
   3. Disconnect the scan tool from the vehicle and connect it to a Techline Terminal with current Service Programing System (SPS) software.
   4. On the Techline Terminal, select Service Programming Systems and follow the Techline Terminal on screen instructions.
   5. Disconnect the scan tool from the Techline Terminal and re-connect it to the vehicle.
   6. With a master passkey III+ (PK3+) key, turn ON the ignition, with the engine OFF.
   7. With the scan tool, select Program ECU under Service Programing System.
   8. At this point the scan tool must remain connected for the duration of the 10 Minute Re-Learn Procedure.
   9. Observe the SECURITY telltale or the scan tool on screen timer, after approximately 10 minutes the scan tool timer will expire and/or the telltale will turn off. The vehicle is now ready to relearn the key information and/or passwords on the next ignition switch transition from OFF to CRANK.
  10. Turn OFF the ignition and wait 5 seconds.
  11. With a master passkey III+ (PK3+) key, start the vehicle, the theft deterrent control module has now learned the key transponder information and the PCM has now learned the fuel continue password.
  12. Turn OFF the ignition and wait 15 seconds minimum.
  13. With a second master passkey III+ (PK3+) key, start the vehicle, the theft deterrent control module has now learned the second master passkey III+ (PK3+) key transponder information.
  14. Learning Additional keys, if required. Refer to Adding Keys .
  15. With the scan tool, clear any DTCs.

     Document ID# 818238

sperry:
The system "Balks" when I enter "2002 Pontiac Montana" in the Passlock III programming instructions..

Readers: Note, from all indicators, this system is not in the Avalanche!

If so, the key will have PK3 on it.

sperry:
Note that my dealer provides & cut's my passlock II keys for free! (within reason). As long as you had purchased the vehicle from them.

Passlock II uses hall-effect devices in the cylinder field.

Passlock III (PK3) keys have a transponder.

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