I purchased for my 93 Seville. The car is old and i love it, but the security was keeping it from starting. My normal mechanic gave up, so i went to the GM dealer next town over. He claimed there was no replacement part available. So i found new rockies and took a last resort kind of risk. 3 days delivery and literally 45 minutes of install time and it's like the car never had an issue. She's started every time since. I don't even worry about it any more.