Battery Equivalents and Replacements

How to Change GMC Key Fob Battery

A key fob is essential for modern car owners, streamlining access and providing a sense of security. For GMC owners, a key fob not only unlocks the doors but also facilitates remote start, panic alarms, and other functions.

Over time, its battery can deplete, leading to unreliable performance.

Published: April 30, 2024.

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First Signs of Weak GMC Key Fob Battery

A weakening GMC key fob battery shows subtle but unmistakable signs. Initially, the key fob may become less responsive, requiring multiple button presses or proximity adjustments to work. This could lead to frustrating situations, particularly in an emergency or rushed moments.

Another sign is a diminished range, forcing you to stand closer to the car for the key fob to function.

Additionally, your vehicle's dashboard may display a warning light or message about the key fob battery. If ignored, these signs may lead to complete failure, leaving you locked out or unable to remotely start your car.

Most Common Key Fob Batteries

GMC key fobs typically use CR2032 or CR2025 lithium coin cell batteries, which are prevalent in key fobs due to their compact size and long-lasting power.

The CR2032, slightly thicker than the CR2025, offers higher capacity, making it the more common choice for GMC key fobs.

Both batteries are widely available at electronics stores, supermarkets, and online. Before purchasing a replacement, check your key fob's specifications to ensure you get the correct type.

How to Change Your GMC Key Fob Battery

Replacing a GMC key fob battery is straightforward, requiring minimal tools.

Start by locating the seam of the key fob's casing, usually found around the edges. Gently pry open the casing using a flat-head screwdriver or a coin, being careful not to apply too much force, as this could damage the internal components. Once open, carefully remove the old battery by sliding or lifting it out.

Insert the new battery, ensuring it is positioned correctly with the positive (+) side facing up or in accordance with any markings on the fob.

After securely placing the new battery, snap the casing back together by pressing the two halves until they click into place. Test the key fob by pressing its buttons to ensure it works correctly.

Do You Have To Reprogram the GMC Key Fob After the Battery Replacement?

Replacing the battery in your GMC key fob may raise concerns about whether it needs to be reprogrammed to function correctly.

Fortunately, in most cases, changing the battery does not necessitate reprogramming. GMC key fobs are designed with non-volatile memory, meaning they retain their programming even if the battery is removed or goes dead.

However, after replacing the battery, it's advisable to test the key fob's functions to ensure everything works as expected. If the key fob doesn't operate correctly or has trouble syncing with your vehicle, try pressing the buttons several times to wake it up.

In some cases, simply restarting your vehicle or pressing the lock and unlock buttons simultaneously can help reestablish a connection between the key fob and your car.

If your key fob still fails to work after these attempts, it might indicate a deeper issue, such as a faulty key fob or a problem with your vehicle's receiver.

In such cases, contacting a GMC dealer or qualified locksmith can help diagnose and resolve the problem. They can also reprogram the key fob if necessary, ensuring a secure and reliable connection to your vehicle.

Popular GMC Models and Their Key Fob Batteries

GMC offers a diverse lineup of vehicles ranging from rugged trucks to spacious SUVs, each catering to distinct needs.

Regardless of the model, modern GMC vehicles rely heavily on key fobs for convenience and security. Here's a look at popular GMC models and the types of batteries their key fobs commonly use.

GMC Sierra

The GMC Sierra, a staple in the truck segment, is known for its robust design and versatile performance. The Sierra's key fob, integral to its functionality, typically uses a CR2032 lithium coin cell battery.

This battery's compact size and high capacity make it ideal for the Sierra's key fob, ensuring consistent performance for unlocking the doors, starting the engine remotely, and engaging other features.

GMC Yukon

The GMC Yukon, a full-size SUV catering to families and adventurers alike, relies on a key fob to manage its comprehensive features.

The Yukon's key fob also commonly uses a CR2032 or CR2025 battery, similar to other GMC models.

The CR2032's slightly larger capacity provides reliable power to handle the Yukon's multitude of functions, including remote locking, starting, and tailgate access.

GMC Acadia

The GMC Acadia, a midsize SUV blending comfort and capability, utilizes a key fob to enhance its user experience.

Like its counterparts, the Acadia's key fob generally employs a CR2032 battery, providing sufficient power for its varied functions.

These include remote locking, unlocking, and alarm activation, ensuring smooth operation and added security for Acadia owners.

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How to Start GMC With Dead Key Fob Battery?

Discovering your GMC key fob battery is dead can be a frustrating experience, especially when you're ready to hit the road.

Fortunately, GMC vehicles are designed with features that allow you to start your car even when the key fob battery is depleted.

Using the Backup Key

Most GMC key fobs contain a physical backup key, often concealed within the fob's casing. This key can be used to unlock the driver's side door manually, granting access to the vehicle.

To release the key, locate the release button on the fob, typically on the side or back, and slide or press it to remove the physical key. This key can then be used to unlock the door, allowing entry into the vehicle.

Starting the Vehicle Manually

Once inside the vehicle, you can still start the engine even if the key fob battery is dead. Many GMC vehicles are equipped with a transponder system that detects the key fob's presence even with a depleted battery.

Place the key fob near the designated area, such as the start/stop button or ignition, depending on your vehicle model. Press the start button or turn the ignition as usual, allowing the vehicle to detect the fob and start.


GMC vehicles offer robust solutions for starting your car even when the key fob battery is dead. Utilizing the backup key for manual door access and positioning the key fob near the ignition ensures you can get back on the road quickly.

These built-in features provide GMC owners with the reassurance and convenience needed to handle unexpected key fob battery failures, maintaining their car's functionality.