make sure the BTSI fuse under the hood is good and the B/U LP fuse. if good, inspect the park lock solenoid connector for a loose wire, if found repair as necessary, if it's ok replace the park lock solenoid (but make sure the wire is not broken) good luck. i hope i helped and please accept my answer. thanks T-MAN
Important: After assembling the shift lock actuator, turn the ignition forward but do not start (auxiliary position) and attempt to pull the lever from PARK with and without the brake pedal depressed to verify there is no gear access without the brake pedal depressed.
Important: Ensure the key cannot be removed from the ignition unless both the shifter is in PARK and the shift knob button has been depressed.