LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 57 (Automatic Transmission - 8L90 (M5U) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P2817 or P2818 >> 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. Verify the condition does not exist: Incorrect fluid level or condition Refer to: Transmission Fluid Level and Condition Check 
    • If a condition exists 

      Repair or replace as necessary.

    • Go to next step: If no condition exists 
  2. Ignition - On / Vehicle - In Service Mode
  3. Clear DTCs
  4. Road test the vehicle. Refer to: Road Test 
  5. Verify DTC P2817, P2818 is not set.
    • If DTC P2817, P2818 is set 

      Refer to: Diagnostic Fault Information

    • Go to next step: If no DTC is set 
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  7. Verify DTC P2817, P2818 is not set.
    • Go to next step: If no DTC is set 
  8. All OK.
scientia non olet · About LEMON Manuals