Auto Zone doesn't care about thier customers. They gave my wife the wrong spark plugs. My wife got them installed and her Envoy runs bad and gets poor gas mileage. The manger of the Auto Zone store said she needed the plugs back with the boxes (which were thrown away) or I have to buy new ones ($35.00) and pay to get them changed again. She also said I would have to put on a claim and maybe get some money back. I am in the military and only her for a week and this claim will take weeks. I cannot take a chance that they will take advantage of my wife again. I will never spend a cent in an Auto Zone again. read full review »