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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 P079C >> Component Testing

Component 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 .
  2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
    • If a concern is found, replace the control solenoid (w/body and TCM) valve assembly.
  3. Inspect the trans fluid pump ball check valve for possible sticking or damage.
    • If you found a concern with this check ball, repair the concern.
  4. Inspect the hybrid low, 1-2 clutch boost valve assembly and the hybrid low, 1-2 clutch regulator valve assembly for sticking or damage.
    • If you found a concern with the hybrid low, 1-2 clutch boost valve assembly or the hybrid low, 1-2 clutch regulator valve assembly, repair or replace the valve or valve body.
  5. Inspect the 4th clutch assembly for a slipping or damaged condition.
    • If you found a 4th clutch assembly concern, repair or replace the low and reverse clutch assembly as necessary.
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