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Key Identification and Usage

WARNING: This page is about a different car, the 2005 GMC Sierra and 2005 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Keys Cut Positions
GM1369924Courtesy of GENERAL MOTORS CORP.

The keys are double sided and reversible. The master key and the valet key contain transponders that are read by the theft deterrent system when the keys are used in the ignition. The keys have 10 cuts positions (1) with 4 different depths (2).

The keys that are furnished with the vehicle are: