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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. Ignition ON, engine OFF.
  2. Install a scan tool.
  3. Ensure no other ECBM or TCCM codes are set.
    • If any other EBCM or TCCM DTC's are set, diagnose them first.