I have an 82 K10 4x4. Most of the time it drives straight as an arrow. I can usually let go of the steering wheel on a straight, smoothe road and it wont veer off to one side or the other. But, occasionally after I make a right turn it will just jerk pretty violently back and forth out of nowhere and it's hard to control. Today after I made a right turn it jerked a couple times and then I had to hold the steering wheel like i was making a right turn just to keep the truck STRAIGHT! Anybody have any ideas? This thing has felt like a death trap the last couple of days.