in fact my SA did say that he didn't think that either the two-button salute, or the two-button + brake probably wouldn't reset the camera system.
I'm having the same exact problem. I think this is a different glitch beyond just the issues people have had with the backup camera not working. Beyond the backup camera issue, my location is stuck at one spot and doesn't change as I drive. Looks like I"m parked and not moving even through I can drive. It looks like the other cameras also don't work since not other cars show up on the screen and no road lines or other obstacles when driving. Nothing I've done has fixed this although I haven't done a hard reset yet. DId you try the hard reset (two button + brake) and did it fix your problem?