GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

Disconnect the negative battery cable.


    Object Number: 421892  Size: SH
  1. Make sure that the module and the electrical connectors are wiped clean with a shop towel prior to removal.

  2. Object Number: 421896  Size: SH
  3. Disconnect both of the fuel tank balance module electrical connectors.

  4. Object Number: 421897  Size: SH
  5. Remove the fuel tank balance module mounting bolts.
  6. Remove the balance module.

Installation Procedure


    Object Number: 421897  Size: SH
  1. Install the new balance module using both of the bolts.

  2. Object Number: 421896  Size: SH
  3. Install both of the balance module electrical connectors.

  4. Object Number: 421892  Size: SH
  5. Connect the negative battery cable.