GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2001 🢒 Savana 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Pressure Regulator Valve Replacement

Removal Procedure

    Object Number: 43318 Size: SH
  1. Raise the vehicle.
  2. Remove the oil pan and the filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  3. Remove the retainer ring.
  4. Remove the reverse boost bushing.
  5. Remove the reverse boost valve.
  6. Remove the pressure regulator spring retainer.
  7. Remove the pressure regulator spring.
  8. Remove the pressure regulator valve.

Installation Procedure

    Object Number: 43318 Size: SH
  1. Install the pressure regulator valve.
  2. Install the pre-assembled reverse boost valve bushing.
  3. Install the new reverse boost valve.
  4. Install the new pressure regulator spring retainer.
  5. Install an added isolator spring to the pressure regulator spring.
  6. Install the pressure regulator spring.
  7. Install the pre-assembled parts into the pump bore.
  8. Install the retainer ring while holding the reverse boost valve bushing in place.

    9. Make sure the retainer is in the groove.

  9. Install the oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement .
  10. Lower the vehicle.

    11. 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.

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