Cutting Keys

Fig 1: Identifying Key Cutting Depths

Courtesy of GENERAL MOTORS CORP.

The key code can be obtained from the 4 digit number located on the key tag that accompanies the original keys. The 4 digit number cross references to a key code and tumbler sequence. The key code can also be determined by examining the key cut positions and cut depths on the actual key (1).

Each key has ten key cut positions (1) and four key cut depths (2). The Key cut positions are numbered 1-10, counting from the head of the key to the tip. The key cut depths are 1-4, cut depth number 4 is the deepest cut. The key transponder (3) in the keys must be programmed to the vehicle. Refer to Programming Theft Deterrent System Components in Theft Deterrent.

1. Cut a blank key with the proper key cut position and key cut depth according to the tumbler sequence in the lock cylinders or the key code on the original key.
2. Inspect the mechanical operation of the duplicated key in the one front side door lock cylinder and the ignition lock cylinder to insure proper fit and function.
3. If replacing a master or duplicating a key, program the key transponder to the vehicle.
   • If a learned master key is available, refer to Adding Keys (Domestic) or Adding Keys (Export including Canada) in Theft Deterrent.
   • If a learned master key is not available, refer to Replacing Keys in Theft Deterrent.