How To Turn Off Auto Stop On 2018 Gmc Terrain

The 2018 GMC Terrain, like many modern vehicles, incorporates an Auto Stop (also known as Auto Start/Stop) feature designed to improve fuel efficiency. This system automatically shuts off the engine when the vehicle comes to a complete stop, such as at a traffic light, and restarts it when the brake pedal is released or the accelerator pedal is pressed. While intended to save fuel, some drivers find the feature disruptive or prefer to have more control over when the engine shuts off.

Understanding the Auto Stop System

Before attempting to disable the Auto Stop feature, it's helpful to understand how it functions. The system relies on several sensors and conditions to determine when to activate. Typically, these conditions include:

• The vehicle is at a complete stop.
• The brake pedal is depressed.
• The engine has reached its normal operating temperature.
• The battery has sufficient charge.
• The climate control system's demands are not excessive.
• The vehicle is not on a steep incline.

If any of these conditions are not met, the Auto Stop system will not engage. The system is designed to be seamless and unnoticeable, but the engine restart can sometimes be perceived as a slight jolt.

Disabling Auto Stop: Available Options

Unfortunately, the 2018 GMC Terrain does not have a dedicated button or switch to permanently disable the Auto Stop feature. This means that the system will automatically engage each time the vehicle is started. However, there are several methods to temporarily disable or mitigate the effects of Auto Stop.

Method 1: Adjusting Brake Pedal Pressure

The most common method is to carefully modulate the pressure on the brake pedal. The Auto Stop system is sensitive to the amount of pressure applied. By slightly reducing the pressure on the brake pedal once the vehicle is stopped, it's possible to prevent the engine from shutting off. This technique requires practice to find the "sweet spot" where the vehicle remains stationary but the Auto Stop system doesn't activate.

This method may not be ideal in all situations, particularly when stopped on an incline, as it may require more precise brake control to prevent the vehicle from rolling.

Method 2: Using the Gear Selector

In some situations, shifting the gear selector to "L" (Low) or manually selecting a gear can prevent Auto Stop from activating. This is because the Auto Stop system is typically disabled in these modes to provide more immediate engine response for driving conditions that require it.

However, using "L" or manually selecting a gear will affect the vehicle's performance and fuel economy, so it should only be used temporarily when you specifically want to avoid Auto Stop. Operating the vehicle in "L" at higher speeds for extended periods is not recommended.

Method 3: Affecting Cabin Temperature

The Auto Stop system takes into account the demands of the climate control system. On hot days, setting the air conditioning to a very low temperature, or on cold days, setting the heater to a very high temperature, can sometimes prevent Auto Stop from engaging. This is because the system will prioritize maintaining the desired cabin temperature and will keep the engine running to power the climate control system.

This method is not always reliable and can significantly impact fuel economy and climate control performance. It's also important to be mindful of the increased energy consumption associated with extreme temperature settings.

Method 4: Aftermarket Devices

A more permanent, although not factory-approved, solution involves the use of aftermarket devices specifically designed to disable the Auto Stop feature. These devices typically work by intercepting the signal that triggers the engine to shut off, effectively preventing the system from activating.

Installing aftermarket devices can potentially void your vehicle's warranty and may not be legal in all jurisdictions. It is crucial to thoroughly research the device and the installer before proceeding. Always ensure the device is compatible with your specific vehicle model and year. Improper installation can lead to electrical problems and other malfunctions.

There are a few different types of aftermarket solutions available:

• Simple Disabling Modules: These plug-and-play devices are designed to be easily installed and disable the Auto Stop feature by default each time the vehicle is started.
• Programmable Modules: These more advanced modules offer greater flexibility, allowing you to customize the Auto Stop behavior based on your preferences. Some modules may even allow you to temporarily re-enable the Auto Stop feature if desired.

Before considering an aftermarket solution, carefully weigh the potential risks and benefits and consult with a qualified mechanic or automotive electrician.

Important Considerations

Before attempting to disable or modify the Auto Stop system, it's essential to keep the following points in mind:

• Warranty Implications: Modifying your vehicle's systems, particularly the electrical system, can potentially void your warranty. Consult your warranty documentation or contact your dealership to understand the potential impact.
• Legal Compliance: Some jurisdictions may have regulations regarding modifications to vehicle emissions control systems. Ensure that any modifications you make comply with local laws and regulations.
• Safety Concerns: Improperly installed or malfunctioning aftermarket devices can pose safety risks. Always use reputable products and have them installed by qualified professionals.
• Fuel Economy: Disabling the Auto Stop feature will likely result in reduced fuel economy. Consider the trade-off between convenience and fuel savings.

Always prioritize safety and compliance with applicable laws and regulations.

Alternatives to Complete Disablement

If you find the Auto Stop feature annoying but are hesitant to completely disable it, consider these alternative strategies:

• Adjust Driving Habits: Anticipating traffic flow and avoiding unnecessary stops can reduce the frequency of Auto Stop activation.
• Optimize Vehicle Maintenance: Ensuring your vehicle is properly maintained, including a healthy battery, can improve the smoothness and responsiveness of the Auto Stop system.
• Consult Your Dealership: Your dealership may have software updates or other solutions that can improve the performance or behavior of the Auto Stop system.

Conclusion

While permanently disabling the Auto Stop feature on a 2018 GMC Terrain isn't straightforward, several methods can temporarily mitigate its effects. Adjusting brake pedal pressure is a common technique, while utilizing the gear selector or influencing cabin temperature can also provide temporary relief. Aftermarket devices offer a more permanent solution but come with potential risks and warranty implications. Ultimately, the decision to disable or modify the Auto Stop system is a personal one, weighing the benefits of fuel efficiency against individual preferences and driving conditions.

Understanding how to manage the Auto Stop feature empowers drivers to make informed choices about their vehicle's operation and tailor their driving experience to their specific needs. While designed to enhance fuel economy, controlling this feature can improve overall driving satisfaction for some owners.