Replace Key Battery medium urgency

Dead Key Fob Battery: How to Start & Unlock a 2024 GMC Yukon

If your 2024 GMC Yukon key fob suddenly won’t unlock the doors or remote start, the most common cause is a dead fob battery. The vehicle can still be unlocked and started using the built-in backup procedures. Once you’re mobile, replacing the coin-cell battery usually restores normal operation in minutes.

Understanding Your Situation

The key fob’s coin-cell battery has run too low to transmit a strong signal, so the Yukon may not detect the fob for locking/unlocking or starting. In many cases, the fob will still work intermittently at very close range until the battery is fully depleted.

🚀 Immediate Steps to Take

  1. Use the hidden emergency key blade inside the fob to unlock the driver’s door (look for the release on the fob, then use the mechanical key in the door lock cylinder).
  2. Start the Yukon using the backup fob-detection method: place the fob in the vehicle’s designated backup location (commonly in/near the center console pocket/cupholder area) and then press the brake and push the START/STOP button.
  3. Replace the fob battery with the correct coin cell (commonly CR2032 for many GM fobs) and test lock/unlock and starting; if it still doesn’t work, try a second new battery and inspect the fob for damage.

Your Options

Replace the key fob battery yourself (DIY)

Cost: $3-$10 Time: Same day

Open the fob case carefully, swap in a new coin-cell battery (match the exact type printed on the old battery), and reassemble the fob. Test all buttons and confirm the vehicle recognizes the fob.

âś“ Pros:
  • Fast and inexpensive
  • No programming required for a simple battery swap
âś— Cons:
  • Risk of cracking the case or damaging clips if pried incorrectly
  • Using the wrong battery type or installing it upside-down can mimic a bigger problem

Have a retailer or shop replace the battery

Cost: $0-$25 Time: Same day

A parts store, locksmith, or repair shop replaces the coin-cell battery and may do a quick function test for you.

âś“ Pros:
  • Less chance of damaging the fob housing
  • Convenient if you don’t have tools or a spare battery
âś— Cons:
  • May cost more than DIY
  • Not all locations stock the correct battery or will service all fob styles

Mobile locksmith diagnostics (if battery replacement doesn’t fix it)

Cost: $75-$200 Time: Same day / 1-3 days

If a new battery doesn’t restore function, a locksmith can check for a failed fob, vehicle-side reception issues, or a fob that needs re-synchronization/programming (less common for a simple dead battery scenario).

âś“ Pros:
  • On-site help if you’re stuck
  • Can confirm whether the fob itself has failed
âś— Cons:
  • Higher cost than a battery swap
  • Quality and capability vary—confirm they service 2024 GMC Yukon proximity fobs

Dealer support (battery, testing, or replacement fob)

Cost: $10-$450+ Time: Same day / 1-3 days

A GMC dealer can replace the battery, test the fob and vehicle, and supply/program a new fob if the original is damaged or dead beyond a battery issue.

âś“ Pros:
  • Correct parts and model-specific procedures
  • Best option if a new fob is required
âś— Cons:
  • Most expensive route if you need a replacement fob
  • May require an appointment and proof of ownership

⚠️ What to Avoid

✕ Don’t force the fob open with excessive prying—broken clips and cracked housings are common and can cause future moisture/dirt intrusion.

✕ Don’t assume it’s the vehicle battery or starter issue until you try the backup start procedure and a known-good new coin-cell battery.

✕ Don’t use off-brand or old batteries from a junk drawer—weak or expired coin cells can cause intermittent detection and repeat failures.

⚠️ Common Mistakes to Avoid

  • Using wrong battery type
  • Damaging case during opening
  • Not resetting after replacement
  • Buying expensive batteries

Frequently Asked Questions

Can I start my 2024 GMC Yukon if the key fob battery is dead?

Yes. Use the mechanical key blade to get inside if needed, then use the Yukon’s backup fob-detection method (place the fob in the designated backup spot—often in/near the center console area—and press the brake and the START/STOP button). The vehicle can read the fob’s transponder even when the fob battery is dead.

What battery does a 2024 GMC Yukon key fob use?

Many GM proximity fobs use a CR2032 coin-cell, but you should confirm by checking the battery type printed on the old battery (or your owner’s manual) before buying replacements.

Do I need to reprogram the key fob after replacing the battery?

Typically, no. A battery replacement alone should not require programming. If the fob still won’t work after installing a correct, fresh battery, the fob may be damaged or there may be another issue that needs diagnosis.

Why does my Yukon say “No Remote Detected” even with a new battery?

Common causes include the battery installed upside-down, a poor contact inside the fob, a damaged fob (water drop/impact), or interference. Try a second new battery from a reputable brand and ensure the fob is in the cabin. If the message persists, consider locksmith or dealer diagnostics.

⏱️ Urgency Note: Low to moderate urgency: you can usually still unlock and start the Yukon using the emergency key and backup detection method, but replace the fob battery soon to avoid being locked out or losing remote functions at an inconvenient time.

Related Information

Need Detailed Information?

Get vehicle-specific key fob compatibility, part numbers, and a complete price comparison for your 2024 GMC Yukon.

View Yukon Key Fob Guide →

Last updated: 2026-01-04