Need Spare Key low urgency

Need a Spare Key for Your 2024 GMC Sierra? Options, Costs, and What to Do Next

If you only have one working key fob for your 2024 GMC Sierra, getting a spare now can save you major hassle and cost later. Modern Sierra keys require the correct fob and programming to your truck’s security system. Here’s the safest, most practical way to add a spare in the US market.

Understanding Your Situation

You still have a working key, but you want a backup before the original is lost, damaged, or the battery fails—because replacing all keys is usually much more expensive and time-consuming than adding one while you still have one working.

🚀 Immediate Steps to Take

  1. Confirm what you have now: count your working keys/fobs and note whether you have push-button start and/or a mechanical key blade inside the fob.
  2. Write down your VIN and bring proof of ownership (registration/title) plus a government-issued ID—most providers require this to cut/program keys.
  3. Decide what matters most (lowest cost, fastest turnaround, OEM parts, or convenience) and choose a dealer or an automotive locksmith accordingly.

Your Options

GM Dealer (OEM key fob + programming)

Cost: $250-$550 Time: Same day / 1-3 days (if parts must be ordered)

The dealership supplies an OEM GM key fob (and cuts any mechanical emergency key blade if applicable), then programs it to your 2024 Sierra using GM diagnostic tools and security access.

âś“ Pros:
  • Highest compatibility confidence (OEM parts and correct programming)
  • Dealer can verify the exact fob by VIN and handle any updates or special procedures
âś— Cons:
  • Often the most expensive option
  • May require an appointment and waiting for parts

Automotive Locksmith (aftermarket or OEM fob + programming)

Cost: $180-$450 Time: Same day (often) / 1-2 days

A qualified mobile locksmith supplies a compatible fob (sometimes OEM is available at higher cost), cuts any required blade, and programs it on-site using professional equipment.

âś“ Pros:
  • Usually cheaper than the dealer
  • Convenient mobile service—can be done at your home or workplace
âś— Cons:
  • Quality varies—compatibility depends on using the correct fob and proper programming
  • Some locksmiths may not support every trim/package or may not have OEM fobs in stock

Buy the fob yourself, then pay for programming (dealer or locksmith)

Cost: $120-$450 (fob + programming combined) Time: 1-7 days (shipping) + same day programming

You purchase a fob online or locally, then pay a dealer or locksmith to program it. If the fob includes an emergency key blade, you may also need it cut to match your truck.

âś“ Pros:
  • Potential cost savings if you source the correct fob at a good price
  • You can choose OEM vs aftermarket based on budget
âś— Cons:
  • High risk of buying the wrong/locked/previously-programmed fob that can’t be programmed
  • Some dealers/locksmiths won’t program customer-supplied parts or won’t warranty them

⚠️ What to Avoid

✕ Waiting until you’re down to zero keys—an all-keys-lost situation is typically far more expensive and may require towing or additional security steps.

✕ Buying a used key fob online without confirming it’s new/virgin and correct for a 2024 GMC Sierra (many used fobs can’t be reused or won’t program reliably).

âś• Choosing the cheapest provider without confirming they can program late-model GM trucks and will cut/fit the emergency key blade correctly (if your fob uses one).

⚠️ Common Mistakes to Avoid

  • Waiting until emergency
  • Not testing spare immediately
  • Buying incompatible aftermarket
  • Overpaying at dealership

Frequently Asked Questions

Can I program a spare key fob for a 2024 GMC Sierra myself?

In many cases, late-model GM vehicles require professional programming tools and security access. Plan on dealer or qualified automotive locksmith programming unless your owner’s manual explicitly provides a supported self-program procedure for your exact key type.

Do I need a spare metal key blade if I have push-button start?

Many Sierra fobs include an emergency key blade used for door access if the fob battery is dead or there’s a power issue. Even with push-button start, having the blade cut and tested can prevent lockout headaches.

Is an aftermarket key fob safe to use?

A quality aftermarket fob can work, but reliability and range can vary. If you want maximum consistency and fit/finish, OEM is usually the safest choice; if you choose aftermarket, use a reputable locksmith and confirm compatibility and return policies.

How many keys should I have for my truck?

Most owners aim for at least two working keys/fobs. Two keys reduces the risk of being stranded and typically keeps replacement costs lower if one is lost later.

⏱️ Urgency Note: This is a “do it now to save money later” situation: adding a spare while you still have one working key is usually faster, cheaper, and avoids the complications of an all-keys-lost event.

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