Automatic Stability Control (asc) problems of the 2001 Dodge Ram 3500

From the date of purchase, the vehicle will not track straight ahead without constant correction with the steering wheel. Higher sppeds is less noticable but speed 40 to 55, the truck hunts left and right continously. Had dealer check alignment shortly after purchase when new and they said it was fine. No additional visits to the dealer since. Due to the continous wandering, tire wear is excessive on the steering axle.