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Home >> GMC >> 2021 >> Yukon AT4 >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Secondary And Configurable Customer Controls >> Diagnostic Information and Procedures >> DTC B1A37 >> Circuit/System Testing
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Circuit/System Testing

  1. Verify that no DTCs are set, except DTC B1A37.
    • Go to next step: If only DTC B1A37 is set 
  2. Replace the S70R Steering Wheel Controls Switch - Right.
  3. Verify DTC B1A37 does not set when operating the vehicle within the conditions for running the DTC.
    • If the DTC sets 

      Replace the P16 Instrument Cluster.

    • Go to next step: If the DTC does not set 
  4. All OK.
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