'04 awd escalade with 58k. recently i noticed the car will wander at highway speeds but only in certain areas of a highway. i figure thats due to ruts caused by trucks. I checked to see if the tie rods had play. i dont see any movement in the tie rods, but i do see the entire center link move. is this due to a bad center link or should i replace the pitman and idler arms, or all 3? my wheels are 22's and have been on since the truck was purchased new.