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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 361 (Automatic Transmission - 2ML70 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P07A7 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the Transmission Fluid Level and Condition Check  to verify correct fluid level.
  2. Perform the Line Pressure Check  to verify correct fluid pressure.
  3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection  to verify Q8 control solenoid valve assembly condition.
  4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test  to verify Q8 control solenoid valve assembly functional testing.
  5. 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.
  6. Inspect the 4th clutch assembly for a stuck ON 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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