For 1990-2009 cars

### Key Identification and Usage

The lock cylinder keyway is designed so that other model keys will not enter a current model lock cylinder. A single key is used for all locks on the vehicle.

The key identification is obtained from the five-character key code stamped on the key code tag (1). The code list, available to owners of key cutting equipment from equipment suppliers, determines the lock combinations from the code numbers.

If the code numbers are not available from the records or from the tags, the key code can be obtained from the right-side door lock cylinder (if the key has not been replaced). Lock cylinders supplied by the factory as service parts are unmarked. If the original key is available, the key code cutting combination can be determined by laying the key on the key code diagram.

### Cutting Keys

After the code has been determined from the code list or the key code diagram, perform the following steps:

1. Cut a blank key to the proper level (2) of each of the tumbler positions (1).
2. Inspect the key operation in the lock cylinder.

### Assembling and Coding Lock Cylinders

Replacement lock cylinders are available from GM Service Parts Operations (SPO) as an assembly. No internal parts for the lock cylinders of this vehicle are available. The lock is serviced as a unit. There are no assembly or coding procedures.