Last month, I had major tune up on my vehicle. First I had the timing belt and accessory belts replaced including of course the water pump. I also had the shocks replaced. My question is now everytime I start the car I would hear a screeching noise for several seconds and also when I engaged the a/c. Furthermore, in regards to my shocks when I drive over 60 mph my steering wheel begins to vibrate tremendously. Any suggestions?