I have a 04 gmc sierra an I'm having problems with bump steer an the trucks wandering. I have replaced idler arm an bracket, tie rods, pitman arm, wheel bearings, ball joints, an steering box. I've have truck aligned at 2 different shops an still can't get the issue fixed. I have noticed the drag link is higher on the idler arm side than the pitman arm side. Anyone experience this or know what I should look for?