Important: 
   •  To initiate, this procedures requires that a learned master key be available.    •  A total of 10 master keys or valet keys may be programmed to a single
vehicle.    •  This procedure adds keys only. The procedure does not erase previously
 learned keys.    •  The keys to be learned must duplicate the mechanical cut of the current
 key.    •  If more than one valet key is to be learned, immediately precede each
 valet key with a learned master key. 
Important: 
   •  You may add up to 10 additional master keys or valet keys using
 this procedure if 2 learned master keys are available. If 2 learned
 master keys are not available the 10 minute relearn procedure must be performed.
 Refer to 
Programming Theft Deterrent System Components 
.    •  If more than one valet key is to be learned, immediately precede each
 valet key by 2 learned master keys.    •  This procedure adds keys only. The procedure does not erase previously
 learned keys.    •  The keys to be learned must duplicate the mechanical cut of the current
 key.