Open a GMC with a Dead Key Fob

How to Open a GMC with a Dead Key Fob

Getting into Your GMC

• But first, if you are already inside, click here for help getting started!
• Second, for video help, click here!
• Finally, if you need another manufacturer, click here.

Retrieving the Mechanical Key

Keyless or push button start GMC models use the third of three GM key styles. A mechanical key is held inside the fob and is needed to get into the vehicle.

There are two slightly different shapes, but each operates in the same basic way. There is a button on the side of the key fob or transmitter near the key ring, as shown above. To remove the mechanical key, press the button and pull the key away.

Getting Inside

If a key hole is visible at the back of the driver’s door handle, simply insert the key and turn and you’re in.

Unfortunately, many GM models hide the key holes under a cap at the back of the driver’s door, and this includes the GMC Acadia and Terrain. To remove the cap, pull the door handle out to the open position. Insert the key into the slot on the bottom of the cap (3, right).

Push it as far upwards as possible and hold upward pressure. Then pry outward. And yes, you WILL feel like you are prying off a piece of your car! Move the cap rearward revealing the key cylinder. Now the mechanical key can be used in the cylinder. Look for a video here to help.

To replace the cap, insert the two tabs at the back of the cap between the black seal and the metal base. Pull the door handle out to the door open position and move the cap forward and press to snap it into place. You can then release the door handle.

Remember, getting IN the car is most important. If you have difficulty replacing the cap, don’t. Let your dealer do it when you get a new battery for your Key FOB!

Models examined include Acadia, Canyon, Hummer, Savana, Sierra, Terrain, and Yukon. Model years 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, and 2024.

Continue to Part II, Getting Started …

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