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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 Verification

Circuit/System Verification

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. Verify that DTCs P0721, P0722, P0723, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P2720, P2721, P2728, P2729, or P2730 are not set.
  2. Perform the Transmission Fluid Check .
  3. Turn ON the ignition, with the engine OFF.
    4. IMPORTANT: Before clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records.
  4. Record the DTC Freeze Frame and Failure Records.
  5. Clear the DTC.
  6. Operate the vehicle in DRIVE to obtain 72 km/h (45 mph) and achieve 4th gear, stop the vehicle, turn the ignition Off for at least 30 seconds. Perform this 2 times.
    • If the DTC resets, go to Circuit/System Testing below.
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