A 'GROANING' NOISE MAY COME FROM THE FRONT POWER WINDOWS AFTER THE GLASS IS POWERED FULL UP. THIS NOISE IS CAUSED BY IMPROPER LUBRICATION ON THE WINDOW REGULATOR MECHANISM SLIDING SURFACES. THE GREASE GETS WIPED OFF FROM SLIDING SURFACES DURING NORMAL OPERATION. APPLY TEFLON LUBRICANT (D2AZ-19590-A) TO THE WINDOW REGULATOR MECHANISM.