Is your 1999 Gmc Sierra Key Fob malfunctioning, or have you added a new remote to your collection? Programming your key fob yourself can save you time and money. This guide provides step-by-step instructions for programming your 1999 GMC Sierra key fob, covering both the New Body Style and Classic Body Style models. Whether you’re a seasoned DIY enthusiast or a first-timer, these instructions will help you get your remote working in no time.
Programming Your 1999 GMC Sierra Key Fob: New Body Style Procedure
If your 1999 GMC Sierra is the New Body Style, follow these straightforward steps to program your key fob:
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Ensure All Doors Are Closed: Begin by making sure all doors of your GMC Sierra are completely closed. This is crucial for the programming sequence to initiate correctly.
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Insert the Ignition Key: Place your key into the ignition switch of your Sierra.
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Press and Hold the UNLOCK Button: Locate the power UNLOCK button on the driver’s side door panel. Press and hold this button down. Do not release it until instructed in step 9.
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Prepare for Rapid Steps: The next few steps (5 through 8) need to be performed in quick succession. Be ready to execute them promptly.
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Turn Ignition to ON Position (First Time): Turn the ignition key to the ON position. This is the position right before you would start the engine.
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Turn Ignition to OFF Position (First Time): Immediately after turning it ON, turn the ignition key back to the OFF position.
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Turn Ignition to ON Position (Second Time): Again, quickly turn the ignition key back to the ON position, just as in step 5.
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Turn Ignition to OFF Position (Second Time): Finally, turn the ignition key back to the OFF position one more time.
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Release the UNLOCK Button: Now, release the power UNLOCK button that you have been holding since step 3. At this point, your GMC Sierra should automatically lock and unlock its doors. This indicates that the vehicle has successfully entered the key fob programming mode. If the door locks do not cycle, you will need to restart the procedure from step 1.
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Program the First Remote: Take the key fob you wish to program. Press and hold both the LOCK and UNLOCK buttons simultaneously on the remote. Keep holding them until the doors lock and unlock again. This might take up to 30 seconds.
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Program Additional Remotes: If you have more remotes to program, repeat step 10 immediately for each additional remote, including any previously working remotes. This step ensures all desired remotes are programmed in the same session.
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Exit Programming Mode: To finalize the programming and exit the mode, simply turn the ignition key to the ON position. Your 1999 GMC Sierra key fob programming is now complete for the New Body Style.
Programming Your 1999 GMC Sierra Key Fob: Classic Body Style Procedure
For the Classic Body Style of the 1999 GMC Sierra, the programming procedure involves using the Data Link Port. Here’s how to do it:
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Locate the Data Link Port: Find the Data Link Port, also known as the OBDII port, in your GMC Sierra Classic. It is typically located under the dashboard on the driver’s side. Identify terminals 8 and 4 within the port. Note that the port is wider on the top row, which can help in orientation.
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Connect Terminals 8 and 4: Verify that terminals 8 and 4 have metal contact pins. Using a jumper wire, connect terminal 8 to terminal 4. Keep the jumper wire connected throughout the entire programming process. Ensure you correctly identify terminals 8 and 4 to avoid any issues. Upon successful connection, the vehicle should respond by automatically locking and unlocking the doors, indicating entry into programming mode.
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Program the First Transmitter: Take the first key fob transmitter you want to program. Press and hold both the LOCK and UNLOCK buttons together on this transmitter. After approximately 15 seconds, the vehicle will signal successful programming by locking and unlocking the doors once more. Release the buttons on the transmitter at this point.
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Program Remaining Transmitters: Within one minute of programming the first transmitter, repeat step 3 for any additional key fob transmitters you need to program.
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Remove Jumper Wire: Once you have programmed all desired transmitters, remove the jumper wire from the OBDII Data Link Port. This completes the key fob programming process for the Classic Body Style of your 1999 GMC Sierra.
If you encounter any difficulties programming your 1999 GMC Sierra key fob or prefer professional assistance, consider searching for a qualified key fob installer in your local area. They can offer expert services to program your remote efficiently.
