CHEVROLET Tahoe - Manual (Page 452)

To open the fuel door, push the rearward center
edge inboard and release. The door will pop open.
To remove the fuel cap, turn it slowly
counterclockwise. The fuel cap has a spring in it; if
the cap is released too soon, it will spring back
to the right.
While refueling, hang the tethered fuel cap from
the hook on the fuel door.
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