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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1372 (Automatic Transmission - 2ML70 - DTC P0218 To DTC P0965-P0967) >> DTC P0796 or P0797 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2009 GMC Sierra and 2009 Chevrolet Silverado. 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 Line Pressure Check .
  3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
  4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
  5. 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.
  6. 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.
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