How is a new key fob programmed for a 2015 GMC Sierra 1500?

Required Equipment and Preparation

• A new key fob
• The functioning original key fob
• Your vehicle’s owner’s manual (for reference)

Step 1: Enter Programming Mode

• Insert the original key into the ignition and turn it to the "On" position without starting the engine.
• On the vehicle's display, make sure the odometer is shown and the radio is turned off, as these may cause interference during programming.

Step 2: Use the Vehicle’s Information Display

• Toggle through the menu options using the trip odometer reset stem (located on the instrument panel) until you find "Press to Relearn Remote Key."
• Press and hold the trip odometer reset stem for approximately three seconds until the message, "Remote Key Learning Active," appears on the display.

Step 3: Program the New Key Fob

• Create a comfortable distance from the vehicle with the new key fob in hand.
• Press and hold both the "Lock" and "Unlock" buttons on the new key fob at the same time for about 15 seconds.
• You'll know the programming was successful when you hear the door locks cycle, locking and unlocking.

Step 4: Exit Programming Mode

• To complete the programming process, turn the ignition to the "Off" position and remove the key from the ignition.
• Test the new key fob by locking and unlocking the doors to ensure it operates correctly.

Troubleshooting

• If the key fob programming fails, repeat the steps. It's essential to ensure each step is followed precisely.
• Check the battery of the new key fob, as a low or dead battery can prevent successful programming.

Professional Assistance

• If you are unsuccessful after multiple attempts, consider seeking assistance from a professional locksmith or a GMC dealership. They have specialized tools and software to program key fobs accurately.