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Damaged Key Fob for a 2024 GMC Sierra: What to Do and Replacement Options

A damaged key fob on a 2024 GMC Sierra can cause intermittent unlocking, remote start failures, or a no-start message even when the truck is fine. Physical damage, water exposure, or a broken battery contact can stop the fob from communicating reliably. The good news: you usually have safe ways to get in and start the truck while you arrange a fix.

Understanding Your Situation

The key fob’s internal circuit board, battery contacts, buttons, or case can be damaged by drops, crushing, moisture, or corrosion. Even if the battery is good, a cracked solder joint or water intrusion can reduce signal strength or prevent the fob from being detected by the vehicle.

🚀 Immediate Steps to Take

  1. Try your spare key/fob first to confirm the issue is the damaged fob (and not the truck).
  2. Inspect the fob: remove the battery (note orientation), look for corrosion or a loose/bent battery contact, dry it if it was exposed to moisture, then install a fresh name-brand battery of the correct type.
  3. If the truck won’t start, use the owner’s manual procedure for a weak/dead fob by placing the fob in the designated backup location (often in the center console area) so the truck can read it, then start the vehicle and drive to a safe location for service.

Your Options

Replace the battery and clean minor corrosion (DIY)

Cost: $5-$15 Time: Same day

Open the fob, install a new battery, and gently clean light corrosion on the battery contacts using electronics-safe methods (avoid soaking). This helps when the damage is limited to a weak battery, dirty contacts, or minor moisture exposure.

âś“ Pros:
  • Lowest cost and fastest
  • Often fixes intermittent range/response issues
âś— Cons:
  • Won’t fix cracked circuit boards, broken buttons, or severe water damage
  • Improper cleaning can worsen damage

Replace the key fob shell/case (reuse original electronics)

Cost: $15-$60 Time: Same day / 1-3 days (shipping)

Move the internal circuit board and key blade/emergency insert (if equipped) into a new outer shell. Best when the buttons are torn, the case is cracked, or the key ring area broke, but the electronics still work.

âś“ Pros:
  • Keeps original programmed electronics (no programming needed if you reuse the same board)
  • Restores button feel and protects internals
âś— Cons:
  • Not a solution if the circuit board is damaged
  • Risk of damaging small clips/seals during transfer

Professional key fob repair (electronics-level repair)

Cost: $40-$150 Time: Same day / 1-3 days

A locksmith or electronics repair specialist inspects the fob, repairs battery terminals, replaces micro-switches (buttons), or re-solders cracked joints when feasible. This is useful when the fob is valuable/rare or you want to preserve the original unit.

âś“ Pros:
  • Can restore function without buying a new OEM fob
  • May be faster than dealer ordering in some areas
âś— Cons:
  • Not all damage is repairable (especially severe water damage)
  • Quality varies by provider; ask about warranty

Replace with a new OEM key fob (dealer)

Cost: $250-$600 Time: Same day / 1-7 days (if ordered)

Purchase a new factory key fob matched to your 2024 Sierra and have it programmed to the truck. The dealer can also verify the correct part number and ensure all features (remote start, tailgate functions, etc.) work.

âś“ Pros:
  • Highest compatibility and reliability
  • Dealer can confirm programming, updates, and key count
âś— Cons:
  • Usually the most expensive route
  • May require appointment and proof of ownership

Replace with an aftermarket fob + programming (locksmith)

Cost: $150-$400 Time: Same day

A mobile automotive locksmith supplies an aftermarket or refurbished fob and programs it to your Sierra. This can be a cost-effective alternative when OEM pricing is high.

âś“ Pros:
  • Often cheaper than dealer and can be done at your location
  • Good option if you need service quickly
âś— Cons:
  • Aftermarket quality varies; range and button feel may differ
  • Not every aftermarket fob supports every feature

⚠️ What to Avoid

✕ Don’t keep using a swollen, leaking, or incorrect battery—dispose of damaged coin cells properly and install the correct type.

✕ Don’t spray liquids (cleaners, WD-40, contact cleaner) directly into the fob; overspray can trap moisture or damage plastics and seals.

✕ Don’t force the case open with excessive prying—broken clips and compromised seals can turn a minor issue into repeat moisture damage.

⚠️ Common Mistakes to Avoid

  • Throwing away damaged key
  • Not salvaging electronics
  • Buying OEM when aftermarket works
  • Not considering case-only replacement

Frequently Asked Questions

Can I still drive my 2024 GMC Sierra if the key fob is damaged?

Often yes. If the fob is weak or partially working, the truck may still start using the backup detection method described in your owner’s manual (placing the fob in the designated backup location). If the fob is completely dead or missing, you may need a replacement and programming.

Will replacing the key fob case require reprogramming?

No—if you transfer your original circuit board into a new shell, it remains the same programmed fob. Reprogramming is typically only needed when you replace the electronics (a different fob).

My fob got wet—should I put it in rice?

Rice is unreliable and can leave dust/debris. The safer approach is to remove the battery promptly, gently dry the exterior, and let the fob air-dry in a warm, dry place. If it was soaked (especially salt water), professional inspection is recommended because corrosion can start quickly.

Do I need to replace both fobs if one is damaged?

Not necessarily. You can replace just the damaged fob. However, it’s smart to maintain at least two working keys/fobs to avoid a more expensive emergency situation later.

⏱️ Urgency Note: If you only have one working key/fob, prioritize replacement soon—losing the last functional key can lead to towing and higher costs. Also act quickly after water exposure, because corrosion can worsen over days and turn a repairable fob into a non-repairable one.

Related Information

Need Detailed Information?

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

View Sierra Key Fob Guide →

Last updated: 2026-01-04