Your vehicle has an automatic transmission shift lock control system. You have to fully apply the regular brakes before you can shift from PARK (P) when the ignition is in RUN. See Automatic Transmission Operation .
If you cannot shift out of PARK (P), ease pressure on the shift lever-push the shift lever all the way into PARK (P) as you maintain brake application. Then move the shift lever into the gear you want. You must press the shift lever button on the shift lever.
If you ever hold the brake pedal down but still can't shift out of PARK (P), try this: