Ignition Key Cannot Be Removed from the Ignition Lock Cylinder for Pontiac Grand Prix 1999

The ignition switch is damaged.

1. Inspect the ignition switch.
2. Replace the ignition switch. Refer to Ignition Switch Replacement - On Vehicle .

The linkage is maladjusted.

1. Inspect the shift linkage.
2. Replace the components as needed. Refer to Electric Park Lock Module - Disassemble - Off Vehicle or Electric Park Lock Module - Assemble - Off Vehicle or Automatic Transmission Shift Lock Control Disassemble - Off Vehicle or Automatic Transmission Shift Lock Control Assemble - Off Vehicle .

The lock cylinder is damaged.

Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement - On Vehicle .