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Home >> GMC >> 2020 >> Acadia SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 233 (Automatic Transmission - 9T50 (M3H), 9T60 (M3G) Or 9T65 (M3W) - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0960, P0962-P0964, P0966-P0968, P0970, P0971, P2670, P2671, P2718, P2720, P2721, P2812, P2814, P2815, P281B, P281D, or P281E >> Component Testing

Component Testing

WARNING: This page is about a different car, the 2021 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Test the resistance between the test points: Terminal 1 @ Q77 Transmission Control Solenoid Valve & Terminal 2 @ Q77 Transmission Control Solenoid Valve

    Verify the value is within the range listed in the table: Transmission Solenoid Information

    • If not in the specified range 

      Replace the component: Q77 Transmission Control Solenoid Valve

    • Go to next step: If in the specified range 
  2. Test for infinite resistance between the test points: Terminal 1 @ Q77 Transmission Control Solenoid Valve & Ground
    • If less than infinite resistance 

      Replace the component: Q77 Transmission Control Solenoid Valve

    • Go to next step: If infinite resistance 
  3. All OK.
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