Seems the interlock system is malfunctioning and possible causes are :
1. Faulty brake switch. Check if the brake lights are working when the shift is stuck in Park. If not, you need to tst if the brake switch is faulty, it could be intermittently not working.
2. Interlock shift solenoid. If the brake lights are working and the shift lever is stuck in Park, with ignition key turned to ON, depress brake pedal and listen for a clicking noise near the gear shift. If there is no noise, either there is a malfunctioning soleanoid or wiring circuit.
If there is a clicking noise and you are not able to shift out of park, the solenoid could be restricted and not moving far enough for the locking tab to be moved to allow the shift lever to be moved out of Park.
Saturday, March 7th, 2009 AT 1:47 PM