2024 GMC Sierra 1500 Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

The 2024 GMC Sierra 1500 does not support DIY on-board programming for its key fobs. This is a common practice with newer vehicles that integrate advanced security systems, making them more resistant to theft but also requiring specialized tools for key programming. Therefore, you will need to visit a dealership or a professional automotive locksmith to program a new key fob.

This is because modern key fobs for vehicles like the 2024 Sierra 1500 often contain a transponder chip that needs to be securely linked to the vehicle's immobilizer system. This intricate process requires a diagnostic scan tool that can communicate with the vehicle's computer and perform a "learn" procedure for the new key. Attempting to program these fobs without the correct equipment can result in the fob not working or, in some cases, even disabling the vehicle's starting system.

Battery replacement

1. Locate the release button: On the side or back of your key fob, you'll find a small release button. Press and hold this button to release the emergency key blade.
2. Remove the emergency key: Slide out the emergency key blade. This will reveal a small slot or opening.
3. Pry open the case: Using a small flathead screwdriver or a coin, gently pry open the key fob case at the seam exposed by removing the emergency key. Work your way around the edges until the two halves separate.
4. Remove the old battery: Carefully note the orientation of the old battery (CR2450). Gently pry it out of its holder.
5. Insert the new battery: Place the new CR2450 battery into the holder, ensuring the positive (+) side is facing the same direction as the old battery.
6. Reassemble the fob: Align the two halves of the key fob case and press them firmly together until they click securely into place. Reinsert the emergency key blade.

Where to buy a replacement fob

• GMC Dealership:

  • Pros: Guaranteed genuine OEM part, often comes with programming included in the price, covered by warranty.
  • Cons: Most expensive option, programming can be costly if purchased separately.
  • Ballpark Price: Expect to pay anywhere from $250 to $400 or more for the fob and programming.

• Automotive Locksmith:

  • Pros: Often more affordable than the dealership, can come to your location (mobile locksmiths), same-day service is common, knowledgeable about various vehicle security systems.
  • Cons: Quality of aftermarket fobs can vary, so ensure the locksmith uses reputable brands. Some locksmiths may not be able to program all types of fobs.
  • Ballpark Price: Typically ranges from $150 to $300 for the fob and programming, depending on the fob type and your location.

• Online Retailers (Amazon, eBay, specialized key fob sites):

  • Pros: Most affordable option for the fob itself, wide selection of OEM and aftermarket fobs.
  • Cons: You'll still need to pay for programming separately from a dealership or locksmith, risk of purchasing counterfeit or incompatible fobs, no recourse if the fob doesn't work after programming attempts.
  • Ballpark Price: Fobs can range from $30 to $150, but remember to factor in the additional cost of programming.

If on-board programming isn't supported

As mentioned, the 2024 GMC Sierra 1500 requires professional programming. This is due to its advanced immobilizer system. The immobilizer transponder is typically integrated into the key fob itself. When the key is inserted or detected, the vehicle's body control module (BCM) or immobilizer module communicates with the transponder. If the transponder signal doesn't match the vehicle's pre-programmed codes, the engine will not start, even if the key blade physically turns the ignition (if applicable) or the push-button start is pressed.

Cost Expectations:

When budgeting for a new key fob for your 2024 Sierra 1500, anticipate costs ranging from approximately $150 to $400. This range accounts for the various options discussed above: an aftermarket fob programmed by a locksmith being at the lower end, and a genuine OEM fob purchased and programmed at a dealership being at the higher end.

Key Blade: If you are getting a new complete key fob, the mechanical key blade will also need to be cut to match your vehicle's ignition and door locks. This is usually included in the overall cost if you are purchasing the fob from a dealership or locksmith.

Find a mobile locksmith or shop on Repairius.