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Circuit/System Verification

WARNING: This page is about a different car, the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
  1. Key ON, engine OFF.
  2. Connect a scan tool.
  3. Verify that all mode selections of the transfer case shift control switch (TCSCS) match the following parameters in the Data Display feature of the scan tool:
    • Mode Switch Selected
    • Transfer Case Position
    • The corresponding Mode Indicator Light
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