How is this possible?

What is your question?

Why is the Corvette less reliable than a Kia Rio? Even the lowest quality cars don't need these basic fuel components replaced after only 50K miles. GM is the new Lada. Given my experience with GM products, I'm not surprised that they have killed so many people, or that GM lied and covered this up for so many years, or that they continue to advertise and pretend it never happened, or that they continue to be unreliable death traps. What surprises me is that they run long enough to exceed their warrantees. Damn these cars and the people who make and sell them.