You can replace a Chevrolet key fob battery yourself in under five minutes with a coin and the correct battery type
Most Chevrolet key fobs use a coin-cell battery — typically CR2032, CR2025, or CR2016 — that you can buy at any drugstore, grocery store, or hardware retailer for $3 to $8. The fob itself is designed to open without tools; you slide a coin into the seam on the edge and gently twist to separate the two halves. Once open, you note which direction the old battery faces, remove it, drop in the new one the same way, and snap the fob back together. The whole process takes longer to read about than to do.
The main variable is finding out which battery your specific fob needs. Chevrolet has used different fob designs across model years and trim levels, so the battery in a 2015 Silverado may differ from the one in a 2015 Malibu. The easiest way to know is to open the fob, look at the battery itself, and read the code printed on it — CR2032 and similar codes are universal across manufacturers. If you want to know before opening it, your owner's manual lists the battery type, or you can call a Chevrolet dealer with your vehicle identification number (VIN) and model year.
Key Takeaways
- Chevrolet key fobs typically use CR2032, CR2025, or CR2016 coin-cell batteries, which cost $3 to $8 and are sold at most retailers.
- The fob opens by inserting a coin into the seam on the edge and twisting gently — no screwdrivers or special tools are needed.
- When you remove the old battery, note which side faces outward so you can install the new one in the same direction.
- If the fob still does not work after you replace the battery, the problem may be a worn contact or a dead fob circuit, not the battery itself.
- Your owner's manual or a Chevrolet dealer can tell you the exact battery type before you open the fob.
Locating the seam and opening the fob safely
The seam runs around the edge of the fob where the two plastic halves meet. On most Chevrolet fobs, it is visible as a thin line running horizontally around the middle or slightly off-center. Hold the fob in one hand with the buttons facing away from you, and use your other hand to insert a coin — a penny, dime, or quarter works — into the seam at the point where it looks widest or most accessible.
Turn the coin gently, as if you were opening a jar lid. You are not forcing it; you are explore steady rotational pressure. The fob will separate into two halves after a quarter-turn or less. If it does not budge after gentle pressure, try a different spot along the seam — some fobs have a preferred opening point. Once the halves separate, set one half aside on a clean surface so the small spring and battery do not fall out or roll away.
Removing and replacing the battery
The battery sits in a small metal or plastic holder inside the fob. Before you touch it, look at which side is facing up — the positive side (marked with a + symbol) or the negative side (marked with a − symbol or left unmarked). This matters because the battery will not work if you install it upside down. Take a photo with your phone if you want a reference while you work.
Gently pry the old battery out using the edge of your coin or a plastic tool like a toothpick. Do not use a sharp metal object that could scratch the battery holder or damage the circuit board. Once the old battery is out, drop the new battery into the same holder, positive side facing the same direction as the old one faced. Press it down gently until it sits flush.
Reassembling the fob and testing the buttons
Align the two halves of the fob so the seams match up, then press them together firmly until you hear or feel a click. The fob should snap shut without gaps. If one half sits higher than the other, separate them again and check that the battery is sitting flat and that no plastic tabs or springs are caught in the seam.
Once the fob is closed, test each button — lock, unlock, panic, trunk, or whatever buttons your fob has. Press each one several times to make sure the new battery is making good contact. If a button does not respond, open the fob again and reseat the battery, making sure it is fully pressed down and facing the correct direction.
What to do if the fob still does not work after replacing the battery
A new battery solves most key fob problems, but not all. If the buttons still do not work, the issue is usually one of three things: the battery is installed upside down (go back and flip it), the metal contacts inside the fob are corroded or worn (which requires cleaning or replacement), or the fob's circuit board has failed (which means the fob itself needs to be replaced).
To rule out a contact problem, open the fob again and look at the small metal contacts where the battery sits. If they look dark, discolored, or pitted, gently clean them with a pencil eraser or a cotton swab barely dampened with rubbing alcohol. Let them dry completely before reinstalling the battery. If the fob still does not work after that, the circuit board is likely dead, and you will need a replacement fob from a Chevrolet dealer or a third-party fob programmed to your vehicle.
Where to buy replacement batteries and how much they cost
CR2032, CR2025, and CR2016 batteries are standard coin cells sold everywhere: drugstores like CVS and Walgreens, grocery stores, hardware stores like Home Depot and Lowe's, and online retailers like Amazon. A single battery costs $3 to $8 depending on the brand and retailer. Many stores sell multipacks of the same battery for $8 to $15, which makes sense if you have multiple fobs or want spares on hand.
You do not need a Chevrolet-branded battery. Any CR2032 (or whichever type your fob uses) from any manufacturer — Energizer, Duracell, Panasonic, or a store brand — will work identically. The only difference is the brand name and sometimes the price. Check the expiration date on the package; batteries do not go bad, but old stock may have lost some charge.
Programming a new fob versus replacing the battery in an existing one
Replacing the battery in a fob you already own is different from programming a brand-new fob to your vehicle. A battery replacement keeps your existing fob working; programming is what you do when you buy a new fob and need to sync it to your car's receiver. If you are only replacing the battery, no programming is needed — the fob's code is already stored in your vehicle's system.
If you buy a replacement fob because the old one is broken beyond repair, you will need to program it. Chevrolet dealers can program new fobs, and some locksmiths and third-party retailers can as well. The cost varies widely, from $50 to $200 depending on your vehicle model and where you go. Your owner's manual may also include instructions for self-programming if your vehicle supports it.
Frequently Asked Questions
Can I use a different battery type if I do not have the exact one my fob needs?
No. CR2032, CR2025, and CR2016 are different sizes and voltages. Using the wrong type may not fit in the holder, or it may fit but not power the fob correctly. Always use the exact type listed on your old battery or in your owner's manual.
How often do key fob batteries need to be replaced?
Most coin-cell batteries last two to four years with normal use. If you use your fob several times a day, the battery may wear out sooner. If you rarely use it, it may last longer. You will know it is time when the buttons stop responding or respond only when you press them very hard.
What should I do with the old battery after I remove it?
Coin-cell batteries are recyclable and should not go in the trash. Take the old battery to a retailer that accepts battery recycling — most Best Buy locations, Home Depot, and Lowe's have collection bins. Some municipalities also have hazardous waste collection days. Do not throw it in the garbage or down the drain.
Will replacing the battery erase any settings or codes stored in my fob?
No. The battery powers the fob, but the code that syncs it to your vehicle is stored separately in the fob's memory chip. Replacing the battery does not affect that code, so your fob will work exactly as it did before once the new battery is installed.
Is it safe to open my key fob myself, or should I take it to a dealer?
It is safe to open it yourself. The fob is designed to be user-serviceable, and there are no electrical hazards or complex parts inside. A dealer will charge you $20 to $50 to do the same five-minute job. The only reason to go to a dealer is if you are uncomfortable opening it or if the fob is damaged in a way that makes opening it difficult.