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Symptoms - Transfer Case: Notes

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.
IMPORTANT:
  • Perform the Diagnostic System Check - Vehicle before using the symptom tables in order to verify the following statements are true:
    • There are no diagnostic trouble codes (DTCs) set.
    • The control modules can communicate via the serial data link.
  • Review the system operation in order to familiarize yourself with the system functions. Refer to Transfer Case Description and Operation .
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