GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Refer to the following transmission component locator graphics as needed:


Object Number: 102561  Size: MH

(54)Ball 6.35 mm (0.25 in) Diameter
(75)PWM Solenoid Screen


Object Number: 102567  Size: SH

(44)Control Valve Body Assembly
(45)Valve Body to Spacer Plate Gasket
(46)Valve Body Spacer Plate
(47)Accumulator Housing to Spacer Plate Gasket
(48)Spacer Plate to Case Gasket
(51)Accumulator Housing
(53)Accumulator Housing to Valve Body Bolt


Object Number: 102570  Size: LH

(33)Electrical Cable Clamp
(34)Electrical Wiring Harness Assembly
(35)Hex Head Bolt, M6 x 1.0 x 55.0
(35)Hex Head Bolt, M6 x 1.0 x 55.0
(35)Hex Head Bolt, M6 x 1.0 x 55.0
(35)Hex Head Bolt, M6 x 1.0 x 55.0
(36)Bolt, M6 x 1.0 x 35.0 LG Valve Body to C.P.
(37)Lube Pipe Retainer
(38)Lube Pipe Clamp
(39)Lube Pipe
(40)Automatic Transmission Fluid Pressure Switch Assembly
(41)Manual Detent Spring Assembly
(43)Fluid Level Indicator (Dipstick) Stop
(44)Control Valve Body Assembly
(51)Accumulator Housing
(75)PWM Solenoid Screen
(76)Special Bolt


Object Number: 102572  Size: SH

(33)Electrical Cable Clamp
(33)Electrical Cable Clamp
(33)Electrical Cable Clamp
(38)Lube Pipe Clamp
(43)Fluid Level Indicator (Dipstick) Stop

  1. Disconnect the battery negative cable assembly from the battery negative terminal. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  2. Raise the vehicle. Refer to Vehicle Lifting and Jacking in General Information.
  3. Support the vehicle with safety stands.
  4. Lower the transmission, if required for clearance.
  5. Remove the transmission oil pan and the transmission oil filter. Refer to Automatic Transmission Fluid and Filter Replacement
  6. Important: Use a cap to cover electrical pins at the case connection.

  7. Remove all electrical connectors from the electrical components.
  8. Remove twenty-one bolts from the valve body assembly and the manual detent spring assembly.
  9. Remove six bolts from the pressure manifold assembly. Use an 8 mm socket.
  10. Ensure the five O-rings are attached to the pressure manifold assembly.
  11. Remove the following parts:
  12. 10.1. The three wiring clips
    10.2. The fluid level indicator stop
    10.3. One bolt using a 10 mm socket
    10.4. The lube pipe
    10.5. The lube pipe retainer
    10.6. The clamp
  13. Remove the following parts:
  14. 11.1. The control valve assembly including the accumulator housing assembly
    11.2. The valve body gaskets
    11.3. The spacer plate
    11.4. The accumulator gasket
  15. Ensure there is no gasket material left on the case surface.
  16. Remove eight check balls from case passages.
  17. Remove the PWM (Pulse Width Modulation) solenoid screen.
  18. Clean the control valve assembly and accumulator housing thoroughly in clean solvent.
  19. Use compressed air in order to dry the control valve assembly.
  20. Disassemble the control valve assembly and the accumulator housing. Refer to Control Valve Body Assembly Removal .

The use of a honing stone, fine sandpaper, or crocus cloth is not recommended for servicing stuck valves. All valve lands have sharply machined corners that are necessary to cleaning the bore. If these corners are rounded, foreign material could wedge between the valve and the bore causing the valve to stick. If a valve must be cleaned, use micro fine lapping compound (900 grit or finer). Too much lapping of the valve will cause excessive clearances and increase the chance of a valve not operating.