Hi folks, I have an 08 G5 GT. Whenever I get up to highway speeds, it's like the steering becomes really loose and your constantly having to correct it. When driving at lower speeds, the steering wheel will randomly turn itself to the left or right whenever you hit a bump, and will kind of be sloppy.

I've replaced/got:
- Steering rack,
- Alignment
- Tires balanced (fixed a previous vibrating issue)

Any ideas what this could be?

Thanks