Probably because the engine noise was drowning them climbing uphill ?
To be honest, I went on some back roads late this afternoon in my Stinger GT, and only on some very rough pavement did I hear some slight creaking (sounded like it was coming from the roof on the passenger side). But it wasn't very loud and not present all the time. And I tried the automatic high beams for the first time and was very pleasantly surprised at how well they work, not being fooled by reflections on road panels.
But I'm very curious about that Kia TSB (technical service bulletin) about this creaking/ticking noises issue that seems to affect some cars and not others... Anyone know exactly what it is, and what number it carries ? Because going back to the dealer with this knowledge might speed things up.
I remember when I had my 2003 Toyota Corolla, I had an issue when the engine was started in very cold weather where there was some severe idle speed hunting. I had found a TSB from Toyota about it online, and went to the dealer with it, and they told me that they weren't aware of it because it concerned only specific models assembled in part in California which my car was one of (early production run, later fully assembled in Canada).
It turned out that Toyota had installed an ECU for the California market by mistake that wasn't programmed to deal with the very cold winter temperatures of Canada, and that they couldn't even just flash the memory because it wasn't even compatible. So they replaced the whole ECU with a proper one at no cost ($1200 worth), and the car was fine after that. So much for Toyota's high quality assurance ?