GM Service Manual Online
For 1990-2009 cars only

Condition

Action

The lock bolt is damaged.

Replace the lock bolt.

Refer to Steering Column Tilt Head Housing - Disassemble - Off Vehicle .

The lock cylinder is faulty.

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

The housing is damaged.

Replace the lock module assembly.

Refer to Electronic Column Lock Module - Disassemble - Off Vehicle .

The sector is damaged, or the sector collapsed.

Replace the lock module assembly.

Refer to Electronic Column Lock Module - Disassemble - Off Vehicle .