It could be a fault with the Body Control Module. System is equipped with self-diagnostic functions and a scan tool would be able to retrieve trouble codes which would hep to identify and locate the source of the problem.
These are B codes and normal code readers would not work.
March, 10, 2011 AT 4:50 PM
Now the electric windows are moving at 1/4 speed. Any relation to the former problem?
March, 11, 2011 AT 11:47 AM
Should not be if they are working. Are all windows working slow or only specific ones?
March, 11, 2011 AT 2:19 PM
All of them
March, 11, 2011 AT 3:05 PM
Have the battery and charging rates checked. Power could be weak.