irrelevant. the platform was a joint project between GM and Fiat. Fiat were just the first to use it but it was developed with GM parts, as taking a grandes suspension apart proved
Corsa coilovers also fit the Grande, the hubs are GM 4x100 too, Fiats 4 stud is 4x98
Hmm, I suppose I am wrong. Didn't think that GM would have stamped everything that was chassis level apart from the chassis. Oh well, you learn something new everyday