Radiator problems of the 2003 Chevrolet Malibu

I along with a friend was riding from phila. To chester,PA. About 25miles south on. Interstate 95. . I was in the middle lane about 10 miles in and the engine cut off. . I remained calm and glad my friend was with me I shifted into neutral turned the key and the engine started right away. This happened two other times before getting to my destination. On the way home the engine cut off two more times. This time I was alone, as you can imagine I was scared and quite upset. I have also had problems with the key turning in the ignition sometimes it works often not even after purchasing a new key and batteries. The engine light remain on , the anti theft system light on and off, the horn, lighter and the receptacle for phone not working even with new fuse and the radiator leaks. Just this year I have spent over 1100. 00. This is dangerous and disgusting. Our family have been very conscience about purchasing american made cars and have invested in made in the USA but it seems gm has little to no interested in our safety. Today the problems still exist and I was told that I have to pay even more to get a diagnostic 149. 00. Wrong answer. . . Please help restore my faith in gm after all we the people did bail you out now own up and look out and take responsilbiltily fix this before more tragedy. . Take care of americans where is your honor ?.

After engine coolant light coming on and reservoir being almost empty service station added coolant. Same thing happened approx 2 months later same action taken. Went to get oil changed and person said don't waste your money because you have oil mixed with your radiator fluid, you have some major engine problems. Took car to my local mechanic and he said this was a common problem on the 2003 Malibu and that the manifold gasket was the problem and needed to be replaced. He replaced it at great expense to myself,and he did make the comment that there is a design flaw with this particular part.