General Motors is recalling almost 40,000 police cars because of problems that could cause a crash. Chevy Impalas from 2008 to 2012 are affected.

A control arm in the suspension can fracture which could cause the driver to lose control. The malfunction is only for police Impalas, the ones sold to the general public have different suspension parts.

GM hasn't received any reports of crashes or injuries. The company says if a fracture does happen, the driver will hear a squeal or chirping sound form from the tires. 

GM says it will replace the parts for free for police departments. Just contact your local dealer to schedule the repairs.

All the cars were built at GM's factory in Oshawa, Ontario.