This is either due to a faulty brake switch or interlock solenoid.
When depressing the brake and shifter could not be disengaged, check if the brake lights are working. If yes, listen for a clicking noise from around the gear shift. If there is a clicking noise but shifter could not be moved, it should be the solenoid linkages that needs to be checked.
Sunday, May 31st, 2009 AT 11:49 AM