I just rotated my tires before I went to the beach. Drove 800 miles round trip no problem. Got in my car this morning and my TPMS light came on and stayed on. I checked the air pressure on all 4 tires and they are as should be per the door placard. I called my dealer and told him what happened and he said they need to be reset every time they are rotated, and he wasn't sure if that was covered under warranty. I don't want to pay someone to rotate my tires and screw up my wheels. I am not stupid or helpless. I wish GM would leave the sensors off. I know how to check my tire pressure, and change my own oil. Any help would be appreciated. Thanks.