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Home › Chevrolet › 2021 › Tahoe SSV › Repair and Diagnosis › Body & Frame › Windows › Fixed And MOVEABLE Window System › Diagnostic Information and Procedures › DTC B1955 › Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Operate the component: S79RR Rear Side Door Window Switch-Right - Pressed & Pulled

    Verify the component works as specified:

    • M74RR Rear Side Door Window Regulator Motor-Right = Up
    • M74RR Rear Side Door Window Regulator Motor-Right = Express Up
    • M74RR Rear Side Door Window Regulator Motor-Right = Down
    • M74RR Rear Side Door Window Regulator Motor-Right = Express Down
    • If the component does not work as specified 

      Refer to: Circuit/System Testing

    • Go to next step: If the component works as specified 
  3. A fault that is not currently present may have been caused by a intermittent condition.
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