GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the transmission oil pan and the transmission oil filter. Refer to AT Fluid/Filter Changing.
  3. Remove the wiring harness (if needed)

  4. Object Number: 102558  Size: SH
  5. Remove the valve bore plug retainer ring.
  6. Remove the following parts:
  7. (Refer to
    Object Number: 102560  Size: MF

    (206)Pump Cover
    (211)Coiled Spring Pin
    (211)Coiled Spring Pin
    (221)Snap Ring
    (223)TCC Valve
    (224)TCC Valve Spring
    (225)TCC Valve Bore Plug
    (226)Reverse Boost Valve Bushing Retainer Ring
    (227)Reverse Boost Valve Bushing
    (228)Reverse Boost Valve
    (229)Pressure Regulator Spring Retainer
    (230)Pressure Regulator Spring
    (231)Pressure Regulator Valve
    (232)Valve Bore Plug
    (232)Valve Bore Plug
    (238)Isolator Pressure Regulator Spring
    .)

    5.1. The valve bore plug
    5.2. The TCC valve
    5.3. The TCC valve spring

Installation Procedure

  1. Install the following parts: Refer to
    Object Number: 102560  Size: MF
    (206)Pump Cover
    (211)Coiled Spring Pin
    (211)Coiled Spring Pin
    (221)Snap Ring
    (223)TCC Valve
    (224)TCC Valve Spring
    (225)TCC Valve Bore Plug
    (226)Reverse Boost Valve Bushing Retainer Ring
    (227)Reverse Boost Valve Bushing
    (228)Reverse Boost Valve
    (229)Pressure Regulator Spring Retainer
    (230)Pressure Regulator Spring
    (231)Pressure Regulator Valve
    (232)Valve Bore Plug
    (232)Valve Bore Plug
    (238)Isolator Pressure Regulator Spring
  2. 1.1. The TCC valve spring
    1.2. The TCC valve
    1.3. The valve bore plug

    Object Number: 102558  Size: SH
  3. Install the valve bore plug retainer ring.
  4. Install the wiring harness, if removed
  5. Install the transmission oil pan and the transmission oil filter. Refer to AT Fluid/Filter Changing.
  6. Lower the vehicle.