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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 251 (Automatic Transmission - 2ML70 - DTC P0218 To DTC P0967) >> DTC P0796 or P0797 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Line Pressure Check .
    • If the pressure is out of specification, correct this concern first.
  2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
    • If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
  3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
    • If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.
  4. Inspect the control valve lower body assembly for sticking valves, damage, scored bores, or debris.
    • If a concern if found in the valve body, repair or replace the valve body as necessary.
  5. Inspect the hybrid low, 1-2 clutch assembly for damage.
    • If a concern is found in the hybrid low, 1-2 clutch, repair or replace as necessary.