Yukon XL 2500 4WD V8-6.0L VIN N (2006)
Step 27 - Step 32
The numbers below refer to the step numbers on the diagnostic table.
2. A partial malfunction in the class 2 serial data circuit uses a different procedure from a total malfunction of the class 2 serial data circuit. The
following modules communicate on the class 2 serial data circuit:
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Audio Amplifier, w/UQ7 and Y91
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Body Control Module (BCM)
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CD Changer (CDX), w/U1S and Y91
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Digital Radio Receiver (DRR), w/U2K or U2L
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Driver Door Module (DDM)
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Driver Seat Module (DSM), w/AN3
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Electronic Brake Control Module (EBCM)
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Electronic Suspension Control (ESC) Module, w/Z55
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Front Passenger Door Module (FPDM)
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Generator Battery Control Module (GBCM)
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HVAC Control Module
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HVAC Control Module - Rear Auxiliary
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Instrument Panel Cluster (IPC)
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Powertrain Control Module (PCM)
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Radio
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Rear Seat Audio (RSA) Controller, w/UK8
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Rear Seat Entertainment (RSE) Assembly, w/U42
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Rear Wheel Steering Control Module (RWSCM)
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Inflatable Restraint Sensing and Diagnostic Module (SDM)
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Transfer Case Shift Control Module (TCSCM), w/NP1/NP8
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Vehicle Communication Interface Module (OnStar), w/UE1
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Vehicle Theft Deterrent (VTD) Module, w/VD1
3. The following DTCs may be retrieved with a history status, but are not the cause of the present condition.
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U1300
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U1301
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U1305