My girlfriend just had her rear sets done under her warrenty. It is covered if the stiching pulls apart. They order new covers, install them, your car smells brand new for awhile, and the rear seats looks like poo for a few weeks while the foam fills the leather again.
BUT IT IS COVERED. There is a Pontiac dealer in Limerick, PA. Ask for Angel. He knows all us local GTO owners. He also has a sweet turbo Viper.
2003 Corvette Z06 - MGW shifter, Corsa X pipe, Corsa Xtreme exhaust, Texas Speed long tubes w/o cats, PowerStop rotors/pads, Conti DWS tires, C6Z51 F&R sways, C5R headlights, tuned
04 GTO - sold