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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. Parking brake engaged. Transmission in Neutral.
  4. Using the Transfer Case Lock function of the Special Function feature of the scan tool, command the transfer case lock ON and OFF. You should be able to hear the encoder motor lock engage and disengage.