GM Service Manual Online
For 1990-2009 cars only

Cause

Action

The brake transmission shift interlock (BTSI) system is damaged.

Repair or replace the BTSI as required.

The housing assembly is damaged.

Replace the housing assembly.

The shaft assembly is damaged.

Replace the shaft assembly.

The park lock cable is not adjusted properly.

Adjust the park lock cable.

Faulty Lock Cylinder

Replace the lock cylinder. Refer to Ignition Lock Cylinder Replacement - On Vehicle in Steering Wheel and Column - Standard or Ignition Lock Cylinder Replacement - On Vehicle in Steering Wheel and Column - Tilt.