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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1350 (Automatic Transmission - 2ML70 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Repair Instructions - Off Vehicle >> Control Valve Assembly Disassemble >> Valve Assembly Overhaul

Valve Assembly Overhaul

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.
Fig 1: Disassembled View Of Valve Assembly
GM1867836Courtesy of GENERAL MOTORS CORP.
Valve Assembly Overhaul

Callout Component Name
WARNING: Valve springs can be tightly compressed. Use care when removing retainers and plugs. Personal injury could result.

Preliminary Procedures

  1. Clean and inspect all valve components and the valve body. The control valve lower body is replaceable only as an assembly.
  2. Clean and inspect the 2 encapsulated ball check valves but do not remove.
1 Auxiliary Line Boost Valve Train
2 1-3 Clutch Regulator Valve Train
3 Hybrid Direct, 2-3-4 Clutch Regulator Valve Train
4 Shift Solenoid Valve Train - Mode A
5 Shift Solenoid Valve Train - Mode B
6 Actuator Feed Limit Valve Train
7 Hybrid Low, 1-2 Clutch Regulator Valve
8 Hybrid Low, 1-2 Clutch Boost Valve Train
9 Clutch Piston Exhaust Blowoff Ball Valve Train