[2001oldsbravda]

I have a 2001 olds bravada (110,000 mi) & have replaced the right hub 2 times now. In Feb 07 I replaced both sides & now 10 months later the right side has gone again. It is still under warranty so thats good but dont want to have to keep replacing yearly. Anybody else have to replace as often as me? Is this a common problem for this truck ? Are some part brand names better to use ? Could there be another reason for these to wear out as often as they do? My mechanic is sick of replacing & I am sick of paying...Any ideas or help would be greatly appreciated. Thanks !