Steering pulling to the left...?

Every case of pullling I have dealt with has been from a bad tire. Tire pressure and a dragging caliper will certainly do it, but most have been from the belt in the tire slipping to one side. A tire professional can recognize the deformity it produces in an instant. Alignment problems are generally just a matter of toe adjustment and do not cause pulling; camber and caster can cause the car to pull but those are rarely adjustable and rarely a problem.