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Home >> Chevrolet >> 2021 >> Tahoe SSV >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Liftgate Window Release Inoperative (TC2) >> Circuit/System Verification

Circuit/System Verification

  1. Ignition - On / Vehicle - In Service Mode
  2. Operate the component: M45 Rear Wiper Motor

    Verify the component operates and returns to the correct park position

    • Go to next step: If the component parks and operates correctly 
  3. Operate the component: Key Fob - Pressed Twice

    Verify the component produces a clicking sound: M33 Liftgate Window Latch

    • If a click cannot be heard or felt 

      Refer to: Circuit/System Testing - Test 1

    • Go to next step: If a click can be heard or felt 
  4. Verify the scan tool parameter: Rear Gate Lift Glass Release = Inactive
    • If not the specified state 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If the specified state 
  5. Operate the component: S141 Liftgate Window Release Switch - Exterior - Pressed

    Verify the scan tool parameter: Rear Gate Lift Glass Release = Active

    • If not the specified state 

      Refer to: Circuit/System Testing - Test 2

    • Go to next step: If the specified state 
  6. A fault is not currently present and may be an intermittent condition