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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 56 (Automatic Transmission - 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0601-P0604 or P062F >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0601-P0604, P062F is not set.
    • If the DTC is set 
    1. Perform all necessary programming and setup procedures for the control module: K71 Transmission Control Module
    2. Verify the DTC does not set.
      • If the DTC sets - Replace the component: K71 Transmission Control Module
      • Go to next step: If the DTC is not set
    3. All OK.
    • Go to next step: If the DTC is not set 
  3. All OK.
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