2011 CTS-V Coupe. The trunk will open with the button on the driver’s door, and with the remote, but not from the button on the trunk lid. I noticed that if I leave the trunk open for a few minutes, until the light goes out, then press the button, the light comes back on, but it won’t work the latch. I’m thinking that it’s some kind of security setting or something, but can’t find any reference for it in the manual. Any ideas?