Replacing the battery in your 2021 GMC Sierra key fob is a quick and easy process that can save you time and money. This guide will walk you through the steps involved, from identifying the correct battery type to testing the fob’s functionality after the replacement.
Understanding Your GMC Sierra Key Fob
The key fob for the 2021 GMC Sierra is a sophisticated piece of technology that allows you to lock, unlock, and even start your vehicle remotely. Like any electronic device, it relies on a battery to function. Over time, this battery will deplete, leading to reduced range or complete failure of the key fob. Knowing how to replace the battery yourself is a valuable skill for any Sierra owner.
Why Replace the Key Fob Battery Yourself?
Replacing the key fob battery yourself is a simple task that can be completed in a matter of minutes. It avoids the inconvenience of visiting a dealership or auto shop, saving you both time and the potential expense of professional replacement.
Gathering the Necessary Tools and Materials
Before you begin, gather the following:
- A new CR2032 battery. This is the standard battery type for most 2021 GMC Sierra key fobs.
- A small flathead screwdriver or a key. Some models have a small slot specifically designed for key insertion.
- A small plastic opening tool or your fingernail. This helps to prevent scratching the key fob casing.
GMC Sierra Key Fob and CR2032 Battery
Step-by-Step Guide to 2021 GMC Sierra Key Fob Battery Replacement
- Locate the release button: On the side of your key fob, you’ll find a small release button. This button releases the metal key from the fob.
- Release the metal key: Press the release button and gently slide the metal key out of the fob.
- Open the key fob casing: Use the small flathead screwdriver or key to carefully pry open the key fob casing along the seam where the metal key was located. Be gentle to avoid damaging the casing. You can also use a small plastic opening tool or your fingernail for this step.
- Identify and remove the old battery: Once the casing is open, you should see the CR2032 battery. Gently pry the old battery out using your fingernail or the small flathead screwdriver.
- Insert the new battery: Place the new CR2032 battery into the slot, making sure the positive (+) side is facing up, just like the old battery.
- Close the key fob casing: Align the two halves of the key fob casing and press them together until they snap shut.
- Reinsert the metal key: Slide the metal key back into its slot until it clicks into place.
Testing the Key Fob After Battery Replacement
After replacing the battery, test all the functions of your key fob to ensure it’s working correctly. Try locking and unlocking your vehicle, and if your Sierra has remote start, test that function as well.
How do I know if the battery replacement was successful?
If your key fob is functioning correctly after the battery replacement, it indicates a successful installation. You should be able to lock, unlock, and use any other features of your key fob without any issues.
Troubleshooting Common Issues
If your key fob isn’t working after replacing the battery, try the following:
- Check the battery orientation: Ensure the new battery is inserted correctly with the positive (+) side facing up.
- Check the battery contacts: Make sure the battery contacts inside the key fob are clean and free of debris.
- Try a different battery: In rare cases, a new battery might be faulty. Try replacing it with another CR2032 battery.
Conclusion
Replacing the battery in your 2021 GMC Sierra key fob is a simple and cost-effective DIY project. By following these steps, you can keep your key fob functioning properly and avoid the hassle of a dealership visit. Remember to always use a CR2032 battery for replacement and test your key fob thoroughly after the process.
FAQ
- What type of battery does the 2021 GMC Sierra key fob use? A CR2032 battery.
- How long does a GMC Sierra key fob battery typically last? The battery lifespan varies depending on usage, but it typically lasts between 3-5 years.
- Can I replace the key fob battery myself? Yes, it’s a simple DIY project.
- What if my key fob still doesn’t work after replacing the battery? Check the battery orientation, clean the battery contacts, or try a different battery. If the issue persists, consult your GMC dealership.
- Where can I purchase a replacement CR2032 battery? CR2032 batteries are readily available at most electronics stores, pharmacies, and online retailers.
- Do I need any special tools to replace the battery? A small flathead screwdriver or a key, and a small plastic opening tool or your fingernail should be sufficient.
- Is there a risk of damaging my key fob during the battery replacement process? While the risk is minimal, be gentle when prying open the casing to avoid scratching or breaking it.
