I just found out there is an open recall on TTA's for the seat belt buttons. My belt buttons are almost white. I guess the red plastic buttons didn't have the proper UV stabilzers. If you take the car in, they will change the buttons for free. Since this is a safety recall it should be available for a long time, as long as your car's VIN doesn't show the recall has already been done.
If you want to fix it yourself, The parts only cost $6. They are GM part # 14097930
Regards,
Gus
If you want to fix it yourself, The parts only cost $6. They are GM part # 14097930
Regards,
Gus