How do you open the gas tank on a 2018 GMC Terrain?

Is there a trick to opening the gas tank on a 2018 GMC Terrain? I have a rental car right now and I can’t figure out how to fill up the tank before I return it.

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Liz Jenson · Answered on Jan 19, 2023
Reviewed by Shannon Martin, Licensed Insurance Agent.
To open the gas tank on a 2018 GMC Terrain, you’ll need to follow these simple steps:
  1. Turn your car off and unlock all of your doors. This is a crucial step, as locking any doors will mean that your fuel door is locked, too.
  2. Exit your vehicle and walk up to your exterior fuel door.
  3. Press gently on the lower lefthand corner of your vehicle’s fuel door. This should release the spring mechanism and cause your GMC’s fuel door to pop open.
  4. Once your fuel door is open, you can carefully unscrew the gas cap to access your fuel tank and fill the vehicle with gas.
If you experience any problems with this process, it’s possible that your GMC Terrain is having some electrical issues and your fuel door isn’t unlocking. In this case, report the issue right away to hopefully get the problem fixed.
You’ll need to fill up your 2018 Terrain before returning it to the rental agency if you want to avoid any extra fees. To save even more money on your next rental, check to see if your car insurance policy or credit card covers rental cars. That way you can skip paying extra for the rental car insurance.
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