Cutting Keys

Fig 1: Identifying Key Cut Positions & Depths

Courtesy of GENERAL MOTORS CORP.

The key code can be obtained by translating the five-character identification code on the key tag or the original Ignition Lock Cylinder. The keys have 10 cut positions (1) and five cut depths (2). Key cut positions are numbered 1 to 10, counting from the head of the key to the tip. The key cut depths are 1 to 5. The master key contains a transponder (3). If the body control module (BCM) does not recognize a valid key transponder, the BCM will disable the vehicle. For programing the keys to the vehicle, refer to Programming Theft Deterrent System Components in Theft Deterrent.

1. Cut a blank key to the proper depth and sequence of each of the tumbler positions.
2. Inspect the mechanical operation of the key in the lock cylinders in the doors, the ignition switch, the rear compartment lid and any storage compartments:
   • Turn the key both directions in each lock cylinder.
   • Turn the key with each side of the key pointing upward in each lock cylinder.
3. If replacing a master key, program the key transponder to the vehicle. Refer to Programming Theft Deterrent System Components in Theft Deterrent.