DETROIT (WKZO) -- A lawsuit has been filed against General Motors over defective tires.  A Pennsylvania woman brought the suit against the automaker claiming that rear-end problems with the 2007 and 2008 Impalas lead to excessive wear and tear on the tires.  If the suit is successful, it could cost GM millions of dollars in replacement tires and parts.  The automaker sold over 420-thousand Impalas between 2007 and 2008.