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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6L50/6L80/6L90 - DTC P0973 To DTC P2764 >> DTC P1751 >> Diagnostic Fault Information

Diagnostic Fault Information

The following fault table will help determine if a hydraulic circuit or an incorrect position of a valve train component affects the transmission operation.

Component Cause DTCs
Automatic Transmission Fluid Pump Cover Assembly TCC control valve stuck in fluid pump cover assembly P1751
Control Solenoid (w/body and TCM) Valve Assembly Shift Solenoid 1:
  • Always exhausting - Stuck On
  • Not exhausting - Stuck Off
  • Needle piston or armature pin binding
  • Control signal fluid supply leak - valve body filter plate assembly cracked or damaged gasket seal
  • Control valve body spacer plate assembly number 4 ball check valve orifice damaged or burred
P1751