Open the key fob and swap the battery in about five minutes

Most Chevy key fobs use a coin-cell battery—usually a CR2032 or CR2025—that you can replace yourself without tools or a trip to the dealer. The battery sits behind a small cover on the fob's edge. You pry that cover open, slide out the old battery, and slide in a new one. The whole job takes longer to find the battery at a store than to do the swap.

The exact steps depend slightly on your fob's design, but the principle is the same across Chevy models from the last 15 years. This guide covers the two most common designs you'll encounter.

Key Takeaways

  • Chevy key fobs almost always use a CR2032 or CR2025 coin-cell battery, which you can buy at any pharmacy, grocery store, or hardware store for a few dollars.
  • Look for a small slot or seam on the edge of your fob—that's where you pry to open the battery cover.
  • Slide the old battery out, note which side was facing up, and slide the new one in the same way.
  • If your fob still doesn't work after a fresh battery, the problem is likely the fob itself, not the battery, and you'll need a replacement from a dealer or locksmith.

Find out what battery your fob needs

Before you buy a replacement, check your owner's manual or look at the battery compartment itself. Most Chevy fobs use a CR2032, which is the standard 3-volt coin cell. Some older models or certain trim levels use a CR2025, which is slightly thinner but the same diameter. Both are sold everywhere—drugstores, grocery stores, dollar stores, hardware stores, and online.

If you're not sure which one your fob takes, open it first (see the next section) and look at the battery itself. The model number is printed right on it. You can also call your Chevy dealer with your vehicle's year and model, and they'll tell you in one call.

Locate the battery cover on your fob

Look at the edge of your key fob—the thin side, not the flat face. You'll see a small slot, seam, or indentation running along the edge. This is where the two halves of the fob meet. On some models, there's a tiny notch or arrow pointing to the spot where you should pry.

If you can't find it by looking, run your fingernail along all four edges. You'll feel a slight gap where the cover sits. That's your entry point. Don't look for a screw or button—Chevy fobs don't have them.

Pry open the cover and remove the old battery

Use something thin and flat to pry the cover open—a coin, a flathead screwdriver, or even a butter knife works. Insert it into the slot and gently twist or lever upward. The cover will pop off. Don't force it; if it's not moving, you're probably in the wrong spot.

Once the cover is off, you'll see the battery sitting in a small metal holder. Note which side is facing up—the positive side (marked with a +) should be facing toward you. Slide the battery out gently. If it's stuck, a tiny dab of pressure with your fingernail usually frees it.

Install the new battery the same way

Take your new CR2032 or CR2025 and slide it into the holder with the positive side facing the same direction as the old one was. It should sit flat and snug. Don't force it; it should slide in smoothly.

Once the battery is in place, press the cover back on. You'll hear or feel a small click when it seats properly. Test your fob by pressing a button—the lights should come on and the car should respond. If nothing happens, try removing the battery, waiting 30 seconds, and reinserting it. Sometimes that resets the connection.

What to do if the fob still doesn't work

If you've installed a fresh battery and the fob still won't work, the problem is not the battery. The issue is usually a worn-out button contact, a cracked circuit board, or a dead receiver in the car itself. A new battery won't fix any of those.

Your options are to buy a replacement fob from a Chevy dealer (which will program it to your car), buy an aftermarket fob online and have a locksmith program it, or take the fob to a locksmith who can repair or reprogram it. Dealer fobs are more expensive but may provide to work. Aftermarket fobs are cheaper but require programming, which adds to the cost if you don't do it yourself.

Frequently Asked Questions

Can I use a different battery if I can't find a CR2032?

Not safely. A CR2025 works in some fobs, but using the wrong voltage or size can damage the circuit board or cause the fob to malfunction. Stick with the battery model printed on your old one. If you can't find it locally, order it online—it will arrive in a day or two and costs just a few dollars.

How often do I need to replace the battery?

Most Chevy key fob batteries last two to four years, depending on how often you use the fob. If you use it several times a day, you might replace it every two years. If you use it less often, it could last longer. There's no set schedule—replace it when the buttons stop responding.

Will replacing the battery erase my car's settings?

No. The battery in your key fob is separate from your car's computer. Replacing it won't affect your seat position, radio presets, or any other settings. It only powers the fob itself.

What if I drop the battery or lose it?

Buy a new one. They're inexpensive and sold everywhere. If you've already opened the fob and lost the battery, just get a CR2032 (or whatever model your fob uses) and install it. You don't need to keep the old one.