How to Reset Passlocks on ’98 Chevy Trucks

Are you struggling with resetting the passlocks on your ’98 Chevy truck? Follow these steps to reset the passlocks and regain control of your vehicle’s security feature.

To reset the passlocks on a ’98 Chevy truck, you can try the following methods:

Method 1: Resetting Passlocks with your Registered Key

  1. Insert your registered key into the ignition and try to start the truck. If the security feature was activated, you won’t be able to start the truck.
  2. Turn the key back to the “Run” position. The security light will start flashing on and off. Keep the key in the “Run” position until the security light stops flashing, which usually takes 10 to 15 minutes. Do not remove the key.
  3. Turn the key clockwise to crank the ignition and wait for your truck to start, confirming that you have successfully reset the passlock.

Method 2: Resetting Passlocks with the Auto Learn Procedure

  1. Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs.
  2. Momentarily rotate the ignition key to the CRANK position (do not start the vehicle), then release it to the RUN position.
  3. Wait for 10 minutes and observe the SECURITY indicator. The response of the indicator will vary depending on the specific situation.
  4. After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat steps 3-6 two more times.
  5. The new security code is now ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module, and VCM/PCM. The new password will be learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

If you encounter any powertrain related diagnostic trouble codes (DTCs), make sure to erase them before proceeding.

It is also important to ensure that the battery is good and charged before starting the reset procedure.

Key Takeaways:

  • Resetting the passlocks on a ’98 Chevy truck involves using the registered key or following the Auto Learn Procedure.
  • With the registered key method, you need to wait for the security light to stop flashing before cranking the ignition.
  • The Auto Learn Procedure requires clearing all EVO/PASSLOCK(TM) module and VCM/PCM DTCs and following a specific sequence.
  • Make sure to erase any powertrain related diagnostic trouble codes (DTCs) before resetting the passlocks.
  • Ensure that the battery is in good condition and fully charged before starting the reset procedure.

Good luck!

Methods to Reset Passlocks

There are two main methods you can try to reset the passlocks on your ’98 Chevy truck—using your registered key and following the Auto Learn Procedure. Let’s explore both methods in detail.

Resetting Passlocks with your Registered Key

  1. Insert your registered key into the ignition and try to start the truck. If the security feature was activated, you won’t be able to start the truck.
  2. Turn the key back to the “Run” position. The security light will start flashing on and off. Keep the key in the “Run” position until the security light stops flashing, which usually takes 10 to 15 minutes. Do not remove the key.
  3. Turn the key clockwise to crank the ignition and wait for your truck to start, confirming that you have successfully reset the passlock.

Resetting Passlocks with the Auto Learn Procedure

  1. Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs.
  2. Momentarily rotate the ignition key to the CRANK position (do not start the vehicle), then release it to the RUN position.
  3. Wait for 10 minutes and observe the SECURITY indicator. The response of the indicator will vary depending on the specific situation.
  4. After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat steps 3-6 two more times.
  5. The new security code is now ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module, and VCM/PCM. The new password will be learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

Before proceeding with the passlock reset procedure, make sure to erase any powertrain related diagnostic trouble codes (DTCs). This will help ensure a smooth reset process.

Additionally, it is crucial to have a good and charged battery connection before starting the reset procedure. A weak battery or poor connection may interfere with the reset process and cause issues. Take the time to check and ensure a proper battery connection.

Good luck resetting the passlocks on your ’98 Chevy truck! By following these methods, you should be able to resolve any passlock security feature issues and restore the full functionality of your truck.

Resetting Passlocks with your Registered Key

To reset the passlocks on your ’98 Chevy truck using your registered key, follow these steps carefully:

  1. Insert your registered key into the ignition and try to start the truck. If the security feature was activated, you won’t be able to start the truck.
  2. Turn the key back to the “Run” position. The security light will start flashing on and off. Keep the key in the “Run” position until the security light stops flashing, which usually takes 10 to 15 minutes. Do not remove the key.
  3. Turn the key clockwise to crank the ignition and wait for your truck to start, confirming that you have successfully reset the passlock.

If this method doesn’t work, you can try the Auto Learn Procedure instead.

Auto Learn Procedure:

  1. Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs.
  2. Momentarily rotate the ignition key to the CRANK position (do not start the vehicle), then release it to the RUN position.
  3. Wait for 10 minutes and observe the SECURITY indicator. The response of the indicator will vary depending on the specific situation.
  4. After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat steps 3-6 two more times.
  5. The new security code is now ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module, and VCM/PCM. The new password will be learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

Before proceeding with the passlock reset procedure, it’s important to clear any powertrain related diagnostic trouble codes (DTCs) that may be present. Ensure that the battery is in good condition and charged to avoid any issues during the reset process.

Good luck!

Resetting Passlocks with the Auto Learn Procedure

If resetting the passlocks with your registered key didn’t work, you can try the Auto Learn Procedure on your ’98 Chevy truck by following these steps:

  1. Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs.
  2. Momentarily rotate the ignition key to the CRANK position (do not start the vehicle), then release it to the RUN position.
  3. Wait for 10 minutes and observe the SECURITY indicator. The response of the indicator will vary depending on the specific situation.
  4. After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat steps 3-6 two more times.
  5. The new security code is now ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module, and VCM/PCM. The new password will be learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

If you encounter any powertrain related diagnostic trouble codes (DTCs), make sure to erase them before proceeding.

It is also important to ensure that the battery is good and charged before starting the reset procedure. A weak or discharged battery can interfere with the reset process.

Good luck!

StepDescription
1Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs.
2Momentarily rotate the ignition key to the CRANK position (do not start the vehicle), then release it to the RUN position.
3Wait for 10 minutes and observe the SECURITY indicator. The response of the indicator will vary depending on the specific situation.
4After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat steps 3-6 two more times.
5The new security code is now ready to be communicated among the PASSLOCK sensor, EVO/PASSLOCK module, and VCM/PCM. The new password will be learned on the next ignition lock cylinder cycle from OFF to CRANK to ON (start attempt).

Powertrain Related Diagnostic Trouble Codes (DTCs)

Before resetting the passlocks on your ’98 Chevy truck, it is crucial to understand and erase any powertrain related diagnostic trouble codes (DTCs). These codes provide valuable information about potential issues with the engine and other powertrain components. Resetting the passlocks without addressing any existing DTCs may lead to unresolved problems and could affect your truck’s performance.

To check for DTCs, you will need an OBD-II scanner or code reader. Connect the scanner to the OBD-II port, usually located under the dashboard on the driver’s side. Follow the device’s instructions to access the DTCs stored in the truck’s computer system.

If any DTCs are present, make a note of them as they can help identify the specific areas that need attention. Once you have recorded the codes, consult the vehicle’s service manual or an experienced mechanic to diagnose and address the underlying issues. This step is crucial as it ensures that your truck is in optimal condition before proceeding with the passlock reset procedure.

After resolving any powertrain-related issues, you can confidently move forward with resetting the passlocks on your ’98 Chevy truck. Remember to follow the appropriate steps outlined in the previous sections, either using your registered key or the Auto Learn Procedure. Clearing the DTCs will help ensure a smooth and successful passlock reset, allowing you to regain control of your vehicle’s security system.

DTCDescription
P0121Throttle Position Sensor (TPS) Circuit Range/Performance Problem
P0300Random/Multiple Cylinder Misfire Detected
P0442Evaporative Emission Control System Leak Detected (small leak)

Remember, resetting the passlocks on your ’98 Chevy truck should only be done after addressing any powertrain-related issues and understanding the diagnostic trouble codes. By taking these steps, you can ensure that your truck is in optimal condition and that the passlock reset procedure is performed effectively.

Ensuring a Good Battery Connection

Before you begin the passlock reset procedure on your ’98 Chevy truck, it is essential to verify and maintain a good and charged battery connection. A proper battery connection is crucial for the successful reset of the passlocks. Follow these steps to ensure a strong battery connection:

  1. Open the hood of your ’98 Chevy truck and locate the battery.
  2. Inspect the battery terminals for any signs of corrosion or damage. If there is corrosion present, clean the terminals using a wire brush and a mixture of baking soda and water.
  3. Tighten the battery terminals securely using a wrench or pliers. Make sure they are snugly fastened to prevent any loose connections.
  4. Check the battery’s charge level using a voltmeter or a battery tester. If the charge is low, recharge the battery or replace it if necessary.

By following these steps, you can ensure that your ’98 Chevy truck’s battery connection is in optimal condition before proceeding with the passlock reset procedure.

StepAction
1Open the hood and locate the battery.
2Inspect battery terminals for corrosion or damage.
3Tighten battery terminals securely.
4Check battery’s charge level.

By following these steps and ensuring a good battery connection, you are ready to proceed with resetting the passlocks on your ’98 Chevy truck. Good luck!

Conclusion and Good Luck

Congratulations! You are now equipped with the knowledge and steps to reset the passlocks on your ’98 Chevy truck. Good luck in securing your vehicle and regaining control of its security feature.

To reset the passlocks on your ’98 Chevy truck, you have two methods to choose from. The first method involves using your registered key. Insert the key into the ignition and attempt to start the truck. If the security feature has been activated, the truck won’t start. Turn the key back to the “Run” position and wait for the security light to stop flashing, usually taking about 10 to 15 minutes. Then, turn the key clockwise to crank the ignition and wait for your truck to start, confirming the successful reset of the passlock.

Alternatively, you can try the Auto Learn Procedure. Make sure the ignition key is in the ON position and clear all EVO/PASSLOCK(TM) module and VCM/PCM DTCs. Momentarily rotate the ignition key to the CRANK position, release it to the RUN position, and wait for 10 minutes while observing the SECURITY indicator. After 10 minutes, turn the ignition switch to the OFF position and wait for 10 seconds. Repeat these steps two more times. The new security code will be learned on the next ignition lock cylinder cycle, allowing you to regain control of your truck’s security feature.

Before proceeding with the passlock reset procedure, ensure that any powertrain related diagnostic trouble codes (DTCs) are erased. Additionally, a good and charged battery connection is crucial for a successful reset. Make sure to check your battery connection and ensure its proper functionality before starting the procedure. Good luck in securing your ’98 Chevy truck and regaining control of its passlock security feature!

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