GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Saturn 🢒 2003 🢒 L300/LW300 🢒 Engine 🢒 Engine Controls - 3.0L (L81) 🢒 Transmission Control Module Replacement

Removal Procedure

    Object Number: 894860 Size: SH
  1. Raise the hood.
  2. Lift up the right end of the hood seal.

    3. Object Number: 894864 Size: SH
  3. Lift up the right side of the cowl cover.

    4. Object Number: 894876 Size: SH
  4. Remove the nuts from the transaxle control module (TCM) cover.

    5. Object Number: 894877 Size: SH
  5. Lift the cover off of the studs.
  6. Depress the lock and rotate the connector lever down.
  7. Disconnect TCM electrical connector.

    8. Object Number: 894880 Size: SH
  8. Depress the lock tab holding the TCM in the carrier.

    9. Object Number: 894883 Size: SH
  9. Lift the TCM straight up to remove the TCM from the carrier.

Installation Procedure

    Object Number: 894886 Size: SH
  1. Insert the TCM into the carrier.
  2. Push straight down until the TCM bottoms in the carrier and the lock tab clicks.

    3. Object Number: 894878 Size: SH
  3. Connect the electrical connector to the TCM.
  4. Rotate the connector lock up past the lock tab to seat the connector.
  5. Install the TCM cover over the studs.

    6. Object Number: 894876 Size: SH

    Notice: If the transaxle control module cover nuts are over-tightened, damage to the mounting studs may occur.

  6. Install and tighten the TCM cover nuts.

    7. Tighten
    Tighten the TCM nuts to 3 N·m (27 lb in).


    Object Number: 894865 Size: SH
  7. Install the right side of the cowl cover.

    8. Object Number: 894863 Size: SH

    Important: The TCM must be reprogrammed when a service replacement module is installed or a DTC 602 will result.

  8. Install the right end of the hood seal.

    9. 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.

  9. Reset the TAP values. Refer to Transmission Adaptive Functions .