Opening the gas tank on the 2018 GMC Terrain is very simple. There's no special button that You need to press inside of the cabin like most other cars. What You will need to do is walk over to the gas tank door. You will then push inward on the left bottom corner. The door should open with the pressure that You put on that left corner. If You're wanting to fuel up Your Terrain, then You can do that now. Make sure You're fueling with the right type of gasoline and You should be good to go.
Bessie A
July 16, 2020
To open the gas tank on the 2018 gmc terrain, press inward on the lower left corner of the fuel door, and it will release the spring.
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