DETROIT — A lawsuit contends that General Motors Co. fixed a defective part on police versions of the Chevrolet Impala but didn’t correct the same problem in hundreds of thousands of other Impalas.
The class-action lawsuit, filed last week in Detroit, says 2007 and 2008 model-year Impalas have defective spindle rods, which connect the suspension to the rear wheels. The defect misaligns the wheels, which makes the tires wear out more rapidly.
According to the lawsuit, GM told dealers to replace the spindle rods and tires on affected police vehicles.
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