I had this same issue when I put coilovers on the tRacer LTS.... It wasn't the camber, that shouldn't have that effect, but too much toe will because the tires are effectively fighting each other. Raised it up .75" and the problem went away. I would check for toe in/out. Unfortunately IIRC that isn't adjustable from the factory on our cars. I have the Saleen kit on my 05 ZX4 and have had no issues in the winter. This year I actually got snow tires and can fly along with the cruise set at 70 with full confidence. Before the snow tires I wouldn't even use the cruise at any speed in the snow. HTH
No, my avvy isn't a B&W photo....meet Jaz, the car that makes any pic look monochromatic!