GM locking gas cap - rip off

[zibby]

If you got GM locking cap (they sell it for $39.99), you may as well don't bother to lock it. You can open it without a key faster than original non-locking cap. All you have to do is squeeze cap and turn left. I got one and after swap I wanted to test it (f.. kids proof it). I was very surprised when it opened. Local dealer took it back. I had to show them, as they didn?t believe me. LOL!!! So now I?m back to beginning looking for solution to lock fuel door.

BTW. Does anyone know any aftermarket locking fuel door that is using screws instead of 3M tape?