2024 GMC Yukon Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Unfortunately, the 2024 GMC Yukon does not support DIY on-board programming for its key fobs. Programming a new key fob requires specialized diagnostic equipment connected to the vehicle's onboard computer. This is typically done by a GMC dealership or a qualified automotive locksmith.

The vehicle's security system, including the immobilizer, needs to be synchronized with the new key fob. This process involves specific software and often a security gateway bypass, which prevents unauthorized programming attempts and enhances vehicle security.

Battery replacement

1. Locate the small release button or tab on the side of the key fob. Press it to release the emergency key blade. Pull the key blade out.
2. With the key blade removed, you will see a slot or a small indentation along the seam of the key fob casing. Use a small, flat-head screwdriver or a coin to carefully pry open the two halves of the fob.
3. Once opened, you will see the circuit board and the CR2450 coin cell battery. Note the orientation of the battery (usually the positive side, marked with a "+" symbol, facing up).
4. Gently pry out the old battery using the same small screwdriver or a non-metallic tool to avoid damaging the contacts.
5. Insert the new CR2450 battery with the positive side facing the same direction as the old one.
6. Carefully align the two halves of the key fob casing and press them together until they click securely into place.
7. Reinsert the emergency key blade.

Where to buy a replacement fob

• GMC Dealership: This is the most straightforward option, ensuring you get an authentic OEM part that is guaranteed to work with your vehicle. The downside is the cost, which can be significantly higher than other options, typically ranging from $250-$400 for the fob and programming.
• Automotive Locksmith: A qualified automotive locksmith can often provide and program a new key fob for your 2024 GMC Yukon. They typically offer both OEM and high-quality aftermarket options at a more competitive price than a dealership. Expect to pay between $180-$300, including the fob and programming.
• Online Retailers (e.g., Amazon, eBay): You can often find OEM and aftermarket key fobs online for a lower price, sometimes as low as $50-$100 for the fob itself. However, you will still need to factor in the cost of programming from a dealership or locksmith, as well as the cost of having the key blade cut. Be cautious of counterfeit products or fobs that may not be compatible with your specific vehicle.

If on-board programming isn't supported

As mentioned, the 2024 GMC Yukon requires a scan tool for key fob programming due to its advanced security system and immobilizer. This system is designed to prevent vehicle theft by ensuring that only correctly programmed and authenticated key fobs can start the engine.

The cost expectations for programming by a professional (dealership or locksmith) were outlined above. This cost typically covers the use of their specialized diagnostic equipment, access to security codes (if required), and the labor involved in linking the new fob to your vehicle's immobilizer system.

The immobilizer transponder is integrated into the key fob itself. When the key fob is present in the vehicle, the immobilizer system reads a unique code from the transponder. If this code matches the one stored in the vehicle's immobilizer control module, the engine will be allowed to start. If the codes do not match, the vehicle will not start, even if the key blade can turn the ignition (for models with a physical ignition barrel) or the push-button start is pressed.

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