2017 GMC Sierra 2500HD Key Fob Programming Guide

Quick reference

Step-by-step on-board programming

Good news! Your 2017 GMC Sierra 2500HD supports on-board programming for the Remote Keyless Entry (RKE) portion of your key fob. This means you can program a new or replacement fob yourself without needing a special scan tool or a trip to the dealer or locksmith for that function. The integrated key blade, however, will still need to be cut and the immobilizer transponder programmed by a professional.

To program your new key fob:

1. Close all vehicle doors.
2. Insert your working, cut, and transponder-programmed key into the ignition.
3. Turn the ignition to the "ON" position (do not start the engine).
4. Locate the Driver Information Center (DIC) buttons on your steering wheel or dashboard.
5. Using the DIC buttons, scroll to the "Vehicle Information Menu."
6. Scroll through the options until you find "Remote Key Learn" or "Remote Control Programming."
7. Press the "Set/Reset" or checkmark button to select the option.
8. The DIC should display "READY FOR REMOTE #1" or a similar message.
9. Hold down the Lock and Unlock buttons on the new key fob simultaneously for approximately 15 seconds. The doors should lock and unlock, or the horn may chirp, indicating successful programming.
10. Repeat step 9 for any additional remotes you wish to program, following the prompts on the DIC for "REMOTE #2," "REMOTE #3," etc.
11. Once all remotes are programmed, turn the ignition to the "OFF" position and remove the key. Test all programmed remotes.

Note: This procedure programs the Remote Keyless Entry functions (lock, unlock, panic, remote start if equipped). It does not program the immobilizer transponder chip inside the key, which is required for the vehicle to start. That requires specialized equipment.

Battery replacement

Replacing the battery in your 2017 GMC Sierra 2500HD key fob is a straightforward process.

1. Separate the key from the fob: Most integrated key fobs for this model have a small button or slider on the side that releases the physical key blade. Press this and pull the key blade out.
2. Pry open the case: With the key blade removed, you'll usually find a small notch or seam along the edge of the fob case. Use a small flat-head screwdriver or a coin to carefully pry the two halves of the fob apart. Be gentle to avoid damaging the internal electronics.
3. Remove the old battery: Note the orientation of the old CR2032 battery (usually positive side up) before carefully prying it out.
4. Insert the new battery: Place the new CR2032 battery into the compartment, ensuring it's oriented correctly.
5. Snap the case back together: Align the two halves of the fob and firmly press them together until they snap securely.
6. Reinsert the key blade: Slide the physical key blade back into the fob until it clicks into place.

Test your fob to ensure it's working correctly.

Where to buy a replacement fob

When your key fob malfunctions or gets lost, you have a few avenues for replacement, each with its pros and cons:

• Dealership:
  • Pros: Guaranteed genuine OEM part, often includes programming of both RKE and immobilizer.
  • Cons: Most expensive option. Expect to pay $200 - $350 or more for the part, cutting, and programming.
• Locksmith:
  • Pros: More affordable than the dealer, often able to provide and program both OEM and high-quality aftermarket fobs. Many mobile locksmiths can come to you.
  • Cons: Quality of aftermarket fobs can vary; verify the locksmith's reputation. Expect to pay $150 - $250 for a new fob, cutting, and programming.
• Online Retailers (e.g., Amazon, eBay):
  • Pros: Cheapest option for the physical fob.
  • Cons: You're only buying the un-cut fob and internal electronics. You'll still need to pay extra for key cutting and immobilizer programming by a locksmith or dealer. Risk of purchasing a non-compatible or low-quality aftermarket part. Fobs typically cost $30 - $80, but remember to budget for professional services.

If on-board programming isn't supported

While your 2017 GMC Sierra 2500HD does support on-board programming for the Remote Keyless Entry (RKE) portion, it's crucial to understand that this doesn't cover the immobilizer transponder.

• Immobilizer Transponder: Every modern vehicle, including your Sierra, has an immobilizer system designed to prevent theft. A small chip (transponder) inside your key fob communicates with your vehicle's computer. If the vehicle doesn't recognize the transponder's unique code, the engine won't start, even if the key blade fits the ignition. The transponder in your 2017 Sierra uses a PK3+ fixed code technology.
• Cost Expectations: To program the immobilizer transponder in a new key, you will always need specialized diagnostic equipment. This means a trip to a locksmith or the dealership. The cost for this service alone can range from $75 - $150, in addition to the cost of the key blank and cutting. If you're buying a complete key fob and service from a professional, this cost is usually bundled.

Find a mobile locksmith or shop on Repairius.