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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 P2723 or P2724 >> 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
1-2-3-4 and 3-5-R Clutch Housing Assembly 1-2-3-4 clutch backing plate retaining ring not seated, causing the piston to over-travel and cut 1-2-3-4 clutch piston seal P2723
Lower Control Valve Body Assembly Clutch select valve 3 stuck OFF - debris, sediment, binding or scored bore P2723
Upper Control Valve Body Assembly 1-2-3-4 Clutch regulator valve stuck - debris, sediment, binding or scored bore P2723
Fluid Pump Cover Assembly
  • Fluid pump cover pump damage or debris between torque converter housing causing pump slide damage
  • Fluid pump cover vanes and fluid pump rotor broken
 P2723
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