Question about GMC Yukon XL
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Posted on Jan 02, 2017
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The theft deterrent module (TDM)
The powertrain control module (PCM)
This procedure is not available on vehicles equipped with EXPORT configured TDMs.
When performing the 30-minute relearn procedure, all previously learned keys will be erased from the TDM memory. Additional keys may be learned after performing the relearn procedure.
When replacing a TDM with a GM SPO Replacement Part, ensure the procedure to setup a new TDM is performed prior to the 30-Minute Relearn Procedure.
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.
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