GM Service Manual Online
For 1990-2009 cars only

Replacement Procedure

Important: Retainer clips hold in each of the valve line-ups. Use a small screwdriver in order to remove the retainer clips. Be careful not to score the valve body when removing the retainer clips and valves. Before removing the valve line-ups, inspect each valve line-up for freedom of movement.


    Object Number: 768699  Size: SH
  1. Remove the transmission side cover. Refer to Control Valve Body Cover Replacement
  2. Remove the TCC solenoid retainer clip (304), the TCC solenoid (335), with two O-rings (337, 338), and screen, the TCC regulated apply valve (339) and the spring (340).

Installation Procedure


    Object Number: 768699  Size: SH
  1. Install the spring (340), the TCC regulated apply valve (339), the TCC solenoid (335) with two O-rings (337 and 338) and screen, and the TCC solenoid retainer clip (304).
  2. Install the transmission side cover. Refer to Control Valve Body Cover Replacement
  3. Important: It is recommended that transmission adaptive pressure (TAP) information be reset.

    Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, The ECM, PCM or TCM will need to relearn TAP values. Transmission performance may be affected as new TAP values are learned.

  4. Reset the TAP values. Refer to Adapt Function.