How to Permanently Disable GM Passlock System: Step-by-Step Guide to Perform It

Are you having difficulty managing your GM Passlock System? This security feature is designed to protect against the theft of a vehicle, but can often be too sensitive and unreliable. In that case, you’ll have to learn how to permanently disable GM Passlock System for a more hassle-free experience.

So, if you’re looking for a solution that will keep your car secure while providing peace of mind, permanently disabling the system may be an option worth considering. In this article, you’ll find an expert’s explanation with a step-by-step guide and analysis on how to reliably and safely disable the GM Passlock System.

So, read on! With these solutions, you can confidently protect yourself from future issues without sacrificing any performance when it comes to starting up quickly or driving with ease.

Content Highlights
  • GM PassLock System is a common anti-theft system used on GM vehicles, but can sometimes malfunction leading to engine no-start conditions and unexpected stoppages.
  • Permanent disabling of the system may leave your vehicle vulnerable to theft or vandalism, so all available repair & replacement solutions should be considered.
  • To determine whether your car has the Passlock or Passkey System inspect the key & cylinder for an embedded resistance chip, check the owner’s manual, and research local Chevrolet dealership service center records.
  • Methods for permanently disabling include key & cylinder inspection, starting the car with the key in the Run position, resetting the system via 10min hold time, replacing the pass lock sensor, and bypassing using OEM tool software/bypassing permission protocols/aftermarket immobilizers.

Understanding the GM Passlock System

Understanding the GM Passlock System
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Through the Passlock sensor technology, GM vehicles are secured from unauthorized access and theft with its specific system designed to keep track of the ignition status.

Purpose and Functionality of Passlock Sensor

The GM Passlock system utilizes a sensor to detect the presence of the correct key in the ignition lock cylinder before enabling fuel delivery to start the engine. The purpose of this is to provide an additional layer of security against unauthorized attempts at starting and operating a General Motors vehicle.

The Passlock sensor sends a signal to authorize fuel delivery when it detects that an authorized key, or key fob, has been inserted into the lock cylinder. This locks out any other attempted starts from unauthorized keys without power being engaged and guarantees automotive safety and security while also denying access to thieves.

It’s important to note however that if not properly maintained or disabled can interfere with remote start or aftermarket security systems due to its strict authorization protocol on fuel delivery enabled by the use of either factory radio unlocks & reset codes, OEM key Programming tool software, or adequate wiring harness accommodations necessary for bypassing permission protocols.

Malfunctions and Common Issues

GM PassLock system is one of the most common anti-theft systems used on General Motors (GM) vehicles. Unfortunately, sometimes this system fails to work correctly. Malfunctions in the GM PassLock system can cause difficulties in starting the car or unexpected engine shutdowns.

As such, it is important to understand how it works as well as its common malfunctions and issues so that these issues can be avoided.

One of the most commonly experienced problems with the GM PassLock system is sensor failure which often leads to an engine no-start condition or an intermittent no-start condition. This issue happens when the wireless receiver of the vehicle cannot detect a signal sent by its security keyfob.

Similarly, if any mechanical part within the ignition switch assembly wears out due to wear and tear over time, then this too may result in similar symptoms occurring. Another problem faced involves incorrect diagnostics codes being sent from the computer, thus resulting in erroneous activation/deactivation of Passlock security features built into different models of cars produced by GM.

Additionally, there have been reported cases where defective wiring harnesses resulted in communication breakdowns between the vehicle and key fobs. This, in turn, led to unexpected vehicle stoppages during driving and a malfunctioning passlock feature, despite repeated attempts to reset it by pressing the broken lock icon button for a continuous 10-minute duration.

This was done with a working key present inside the contact plate near the driver’s seat while ensuring the correct timeout interval parameter was accurately set within the PCM memory chip. These steps were meticulously verified multiple times in advance for added assurance.

GM Ignition Switch Recall

In 2014, General Motors issued a recall for 2.6 million small cars due to a defect in the ignition switch that could shut off the engine and cause power steering, power brakes, and airbag functions to be lost.

This recall was initiated by GM as an important step towards addressing potential safety issues related to this defective part which had been linked with more than two dozen fatal crashes at the time of declaration.

Is It Safe to Permanently Disable the GM Passlock System?

Before deciding to permanently disable the GM PassLock system, one should weigh in a lot of safety considerations. Permanent disabling could potentially leave your vehicle vulnerable to theft and vandalism.

On the other hand, an unfixed or malfunctioning system can be very inconvenient and expensive to repair if ever it requires frequent unlocking or in the worst cases replacement of its parts.

It is important that you first research all available solutions for repairing or replacing your security problem before attempting any permanent disabling procedure – especially when there are warranties that cover key components like ignition cylinders and transponders.

Furthermore, tampering with anti-theft systems may also violate federal law due to the Digital Millennium Copyright Act (DMCA) which makes bypassing legal protection measures illegal without proper authorization from the manufacturer.

Given these security concerns, some vehicle owners choose to go with aftermarket immobilizers as reliable theft deterrents. However, the choice ultimately hinges on the level of security importance they attach to their vehicles and their budget.

Applications like NEWROCKIES Inc.’s UNPLUGNFORGET offer legitimate means to permanently disable GM’s Security Systems, including Pass Lock, at a fraction of the cost that other professional services might entail. Numerous online resources provide different methods to bypass existing GM Security Systems, but it’s vital to exercise caution when selecting who you trust with these sensitive tasks.

How to Determine If Your Car has Passlock or Passkey System

  • To determine if your car has the Passlock or Passkey system, you can try starting the vehicle and observe if the security light goes out. If it does, this indicates that the system has been successfully bypassed.
  • Another method for determining whether your car has a GM Passlock system is to inspect the key and cylinder. If they have an additional resistance chip embedded on top of the keys Rx cut groove then it is likely that your car has a GM PassLock 3 System installed in it.
  • You can also find printed information about which type of immobilizer is installed in the owner’s manual or by checking with your local Chevrolet dealership service center records online.

Methods for Permanently Disabling GM Passlock System

Checking for Damaged Wiring
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There are several methods that can be used to permanently disable the GM Passlock System, such as key and cylinder inspection, starting the car with the key, resetting the system, replacing the passlock sensor, and bypassing the system.

Key and Cylinder Inspection

The Key and Cylinder Inspection method is one of the methods discussed for permanently disabling the GM Passlock system. It involves attempting to start the engine and then releasing the key to the Run position – whilst in this position, the security light located in the instrument panel should be observed.

The goal of this method is to bypass the pass lock system and allow the engine to start. A step-by-step guide along with analysis is provided for the inspection process; The First attempt needs to be made at the start of the car, if it does not set off the alarm but fails two vehicles will lock out after eight minutes, and then be released shortly afterward.

Secondly sender ring near the ignition needs removal where wires are connected into the connector that looks like a rake teeth; once done small resistor needs connecting across terminals before replacing back cover figuratively sandwiching resistance between wiring locking tabs on both sides and making sure all contacts work well again otherwise lights may come up intermittently when engine running.

Starting the Car

When attempting to start a vehicle with the GM Passlock system, the key must be inserted into the ignition switch. Once in position, quickly press down and release the key without turning it.

If the security light in the instrument panel illuminates and shuts off after two to ten seconds, then this indicates that Pass Lock initialization has been successfully completed.

If all is working as it should, engine cranking can begin shortly thereafter. Make sure not to hold or turn for longer than one second while initially trying to start your car since doing so will cause an immobilizing error code to be stored within your vehicle’s memory.

Using Your Key With the Car Door

Inserting the key into the car door can help permanently disable GM Passlock systems. This method requires you to insert your key with the ignition off and hold it in this position for 10 minutes.

During this time, attempt to start your vehicle; if successful, release the key from the Run position and observe if another security light appears. If no light is visible after a few attempts, then inserting your key in and out of the driver-side door has effectively disabled the system.

It should be noted that this may not work for all vehicles as other methods could be used instead or in combination with using keys. Additionally, it is important to remember to always perform any disabling technique on an unloaded vehicle to avoid potential injuries or accidents related to bypassing these safety features.

Resetting the System

The process of resetting the GM PassLock system is a simple one. Starting with turning the key to the run position after attempting to start it, then leaving it there for 10-15 minutes allows the system to time out and allows further attempts at starting.

From this point on, trying this same method two more times should solve any issues you may have been having with system malfunctions. In certain cases, if your Chevy Silverado was produced in 2015 or later, you can also try using a master passkey III key in order to disable and reset its anti-theft security module.

Remember to always consult your owner’s manual before making any important adjustments. Additionally, take extra care not to damage wiring systems when working on vehicle electronics as that could cause permanent damage that won’t be covered by warranty policies.

Replacing the Passlock Sensor

Replacing the Passlock sensor is an important step for people who wish to permanently disable the GM Passlock system. The Passlock system in General Motors vehicles relies on a small, magnetic sensor connected to the key cylinder that can detect when the right key is inserted into the cylinder.

This helps to prevent theft and unauthorized access to the vehicle. If this sensor stops working or fails due to age or wear, it should be replaced as soon as possible. Replacing a faulty passlock sensor can restore all of GM’s anti-theft features back into your vehicle so you won’t have any security concerns over leaving your car parked outside unattended or unlocked.

Depending on the make and model of the SUV, replacing a damaged pass lock sensor may require the removal of the ignition lock cylinder altogether to provide access, followed by soldering new wires onto its board before reconnecting it again.

Bypassing the System

The process of bypassing the GM PassLock system involves first estimating the resistance in order to remove the lock cylinder, attaching a resistor with the correct impedance, and then resetting it.

Estimating the resistance accurately requires several wire checks before the removal of the key cylinder. Once calculated correctly, it is important to make sure that no metal objects touch any contact points for accurate results.

Then check for damaged wiring in both the lock assembly and ignition switch harness; otherwise, resistors may not function properly even after fitting them correctly. After removing the old parts, install new resistors as per the manufacturer’s instruction and follow up by re-programming vehicle keys if necessary.

Checking for Damaged Wiring

The GM PassLock system is designed to provide protection against car theft but can malfunction due to corroded or damaged wiring. Often, this issue causes the car not to start and leaves drivers searching for ways to permanently disable the faulty Passlock system.

Fortunately, one option may be as simple as checking for any damaged wiring involved with the ignition system. In many cases, repairing broken wires resolves a malfunctioning GM PassLock system without requiring more extensive repair or installation of an external bypass module.

Taking this step not only helps avoid potentially costly repairs but also enables drivers to install a remote starter without the need for additional components like a bypass module. This cost-saving technique should not be underestimated when it comes to disabling the problematic Ignition Switch Recall, which aims to curb car thefts across the United States.

It provides vehicle owners with peace of mind, knowing that preemptive safety measures protect them from unauthorized access by potential thieves seeking opportunities for criminal activities like theft and vandalism. This protection is enhanced by various security systems available today. Regular checks, often done through locksmiths and remote key fob services, can help alleviate the security concerns of vehicle owners in major U.S. cities such as New York, Los Angeles, and Chicago.

Re-Programming the Key

Re-programming the key is one method to permanently disable the GM Passlock System. The process involves making a copy of your current programmed keys and replacing them with brand-new electronic or mechanical key fob components that are specially made for specific vehicles.

The procedure includes a series of instructions that must be followed, from removing the lock cylinder to entering the security code into the programming tool in order to reset the system.

This eliminates all old passwords associated with your keys, disabling fuel supply to unauthorized attempts made at starting up your car engine. Additionally, it’s important to note that different vehicle makes have slightly different reprogramming processes; therefore it’s best you refer to your owner’s manual for exact steps.

Steps to Bypass GM Passlock System

The process for bypassing the GM Passlock System involves estimating the resistance, removing the lock cylinder, and attaching a resistor.

Step 1: Estimate the Resistance

When starting to disable the GM PassLock system, the first step is to estimate the resistance associated with it. Estimating this resistance accurately will help you successfully bypass the vehicle security system.

Different GM-model vehicles have different types of PassLock systems; there are the original 1 and newer PassLock II systems. When a key cylinder turns on either model, a sequence of electrons moves between internal circuits that generate a specific program code or “R-code” unique for each vehicle type.

By measuring and understanding this unique R-code created by your specific car, drivers can use preset resistors to simulate an entire ignition key cycle when they need to start up their car’s engine without using its actual keys.

Step 2: Removal of Lock Cylinder

In order to permanently disable the GM Passlock System, the second step involves removing the lock cylinder. This is an important process that allows for a bypass of the PassLock 2 system used in General Motors vehicles.

To access this wire harness, you will need to first remove the appropriate dash panels from your car. The location of the Pass Lock 2 wires varies and can be either coming out of the ignition or over on the wire harness itself.

As a safety precaution, it is recommended to disconnect all power from your vehicle before attempting this step. By removing key components such as these, you will disrupt normal functioning in order to successfully carry out permanent disabling procedures on GM’s passlock system layout.

Step 3: Attaching the Resistor

Resistors are small electrical components that control the amount of current flow in a circuit. As part of permanently disabling the GM Passlock system, resistance must be applied to bypass the vehicle’s theft deterrent module and signal normal operation.

Attaching a resistor provides an alternate method for attaching a remote starter without having to purchase or install an expensive bypass device. It also helps to avoid costly repairs for a broken Passlock system as it will no longer activate when starting the vehicle.

The resistor allows current to flow between different points on the security circuit which simulates normal operation so that fuel remains active in order to start the engine unlike with many other car models where it would disable at attempts being made.

How to Bypass Theft Deterrent Module

GM Passlock Bypass
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To bypass the Theft Deterrent Module, you’ll need to gather the necessary hardware, components, and wiring diagram.

Requirements for Bypassing Theft Deterrent Module

For GM Passlock systems, it may be necessary to bypass the Theft Deterrent Module. In order to do this effectively, you will need a passkey resistor or homemade resistance with 3 terminals and 4 tabs that match the manufacturer’s specs for your vehicle’s model type.

You’ll also need basic hand tools such as pliers and screwdrivers, plus electrical connectors, wire stripper/cutter, terminal picker tool, and digital multimeter. It is also helpful to locate a circuit diagram for the ignition switch wiring passlock bypass before starting in order to understand how each component is connected together.

Additionally, depending on your garage equipment level of capabilities; soldering skills may be required if no pre-built device can fit the specific requirements of your vehicle brand and year model number.

Step-by-Step Guide for Passkey Bypass Process

  1. Estimate the Resistance: The first step is to estimate the resistance of the lock cylinder on your GM vehicle. This can be done by carefully inspecting it and noting any indications of wiring problems, corrosion, or other physical damage that may have been caused during installation.
  2. Removal of Lock Cylinder: Take out the lock and key cylinder in order to access the wires for bypassing purposes. Ensure that you don’t undo any screws or fasteners before removing it as this could damage some internal parts when taken apart unnecessarily.
  3. Attaching a Resistor: Once you’ve accessed the exposed wiring, attach a resistor under either of the two leads connected to the ground (black wire) or the VIN number, whichever demonstrates continuity when tested with an ohmmeter. We’ll refer to this as the Resistor Module Connection Circuit (RMC). If 20KΩ or more is not available, make sure there’s at least 20KΩ across this connection point, as some GM vehicles require more than 10KΩ. If these values are exceeded, create RMC connections using a 26V nominal voltage circuit typically located behind the instrument cluster, as indicated in online diagrams after thorough research and understanding. Do not connect it to a 24V automotive circuit to avoid fire risks, especially when dealing with components like the fuel pump.
  4. Plugging Everything Back in Again: After securely attaching the resistor, reassemble all components and wires that were previously disconnected. Follow the documented process to ensure correct reinstallation. Prioritize safety protocols as system malfunction can lead to complications. Always have a second person present to help if needed. Diagnose potential hazards to prevent accidents. This will ensure satisfaction in daily activities as you work towards permanently disabling the GM Passlock system and securing your property. Seek professional advice for a successful, safe, and quick resolution.

How to Disable Ignition Security in a GM

The procedure for disabling ignition security includes a physical examination of the key and cylinder before re-programming the key to enable starting the car.

Things You’ll Need

If you want to permanently disable the GM Passlock system, it is important that you have the right tools and materials at hand. You will need a wire crimper/cutter, electrical tape or soldering gun, a test light for basic testing of circuits before and after performing repairs, a reset tool for anti-theft systems like VATS and PassKey II, an oscilloscope meter if necessary when dealing with more complex wiring problems and a multimeter for diagnostics of electronic devices.

In addition to these standard tools used by mechanics in general repairs of vehicles, you may also need specific parts such as a replacement lock cylinder assembly or keys if your key has been damaged during use.

The most important thing when disabling any kind of security feature from a car’s computer systems is knowledge- having enough knowledge about those security features allows knowledgeable technicians to find ways around those irritating failures caused by unnecessary electronics involved in engine immobilizer systems.

Procedure for Disabling Ignition Security

Disabling the ignition security in GM vehicles is a straightforward process that can be accomplished using just a few basic tools. The first step is to disconnect the negative battery cable from the car’s frame or chassis.

This will reset any anti-theft and immobilizer systems, allowing for access to the ignition switch itself. Using an appropriate wrench, remove both grounding wires and bolts attached to the back of the ignition module assembly before unscrewing and detaching it from its mountings.

It’s essential to proceed with caution, as improper procedures can result in troubleshooting issues if mishandled. After disconnecting, employ a continuity tester on each pin within configuration 13 (or 15, depending on the model) inside the module housing. Identify the pin that shows continuous current flow when connected to the ground wire connection point.

This signifies the need to turn off power at this point for a permanent security system disablement. It’s advised by automotive experts to connect only one terminal and keep the other side tension-free for enhanced compatibility down the road.

Frequently Asked Questions (FAQs)

Now, let’s explore some frequently asked questions related to the GM Passlock system.

1. What is the GM Passlock system?

The GM Passlock system is a theft deterrent designed by General Motors for their vehicles to maintain safety when leaving the car unattended and unlocked, or with the key left in the ignition.

2. How do I permanently disable the GM Passlock system?

Owners of 2007 Chevrolet Colorado vehicles have the option to permanently disable the GM PassLock 3 System by performing a hard reset. This involves using a 50-ohm resistor, grounded at one end, and strategically attached to specific contact points in order to unlock the system’s functionality.

3. Is there an override function to remove keys from the ignition without disabling my host vehicle’s anti-theft device?             

Yes, some models such as the 2016 Chevrolet Colorados have an override function which can be done by double-clicking into secure mode and then manually pressing down simultaneously on two buttons located near your driver-side door until they are engaged,. This will prevent anyone who doesn’t know how to properly access these locks from being able to get away with your ride!                                                                                    

 4. How can I bypass the Ford Ignition switch wiring diagram if need be?

The best way is to use a wiring diagram that contains diagrams specifically meant for Ford ignition switches so you don’t have unnecessary wires insulated once they’re hooked up correctly – this allows for efficient detection of any possible short circuits or errors in understanding during installation.


Disabling the GM Passlock System for specific models of cars can provide a number of benefits, such as increased security or improved performance. However, it is important to remember that this must be done only by following the instructions within your car’s owner’s manual and with proper caution given to all safety precautions.

Furthermore, if you choose to bypass or replace any components related to the system for more permanent solutions you should consider getting professional assistance from organizations like Newrockies Inc.

It is also essential that any wiring connections made are securely connected in order to ensure safe and reliable operation.


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