GM Service Manual Online
For 1990-2009 cars only

Notice: Use J 36850 or equivalent during assembly in order to retain checkballs or to lubricate components. Lubricants other than the recommended assembly lube changes the transmission fluid characteristics and causes undesirable shift conditions or filter clogging.


    Object Number: 12023  Size: SH
  1. Inspect the pressure regulator valve bore for nicks or scoring.
  2. Install the following parts:
  3. • The pressure regulator valve (211)
    • The pressure regulator spring retainer (210)
    • The pressure regulator valve spring (212)
    • The pressure regulator boost valve (213)
    • The pressure regulator boost valve sleeve (214)
    • The retainer clip (215)

    Object Number: 12022  Size: SH
  4. Inspect the following for damage or nicks:
  5. • The scavenge pump bushing (204)
    • The secondary pump cover (203)
    • The pump ball seat (217)
  6. Install the following parts:
  7. • The secondary pump cutoff ball (216)
    • The pump ball seat (217)
    • The retainer clip (215)