BLU_FZ1
If your "creak" is the same as mine, it used to sound like a slight whirring, or whizzing noise, related to how fast the steering wheel was turned. I only noticed it at idle, and sometimes I felt it through the steering wheel.
I can't remember where I heard about the cause, possibly a thread somewhere, and they suggested it's a rubber seal in the firewall for the steering shaft, that needs lubrication... common on all VX-VY's. My mate has a VX and his is way worse than mine.
I mentioned to my Holden dealer who said they'd fix it during a service. They said it's difficult to get to from underneath, and needs someone at the wheel rotating back and forth so the seal can be greased.
Mine has come back again, I might have to climb under the car and look myself, though I'd have to find out if a special grease must be used, otherwise it might swell or damage the rubber.
If anyone else knows the solution to my problem, please let me know.