GM Service Manual Online
For 1990-2009 cars only

Fuel Tank Fuel Pump Module Replacement 1500 Series

Tools Required

J 45722 Fuel Sender Lock Ring Wrench

Removal Procedure


    Object Number: 1346842  Size: SH
  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect fuel and evaporative emission (EVAP) lines from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Notice: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    Important: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  4. Using the J 45722 and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  5. Remove the lock ring.

  6. Object Number: 1254425  Size: SH
  7. Carefully lift the module from the fuel tank enough to access the quick connect fittings (1) under the module cover. Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Remove the fuel tank module.
  9. Remove and discard the fuel tank module seal.

  10. Object Number: 1617750  Size: SH

    Important: 

       • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
       • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
       • Check the lock ring for flatness.

  11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

Installation Procedure


    Object Number: 1254425  Size: SH
  1. Install the NEW fuel tank module seal onto the fuel tank.
  2. Pull the vent lines in the fuel tank up as far as possible for ease of installation.
  3. Position the fuel tank module part way into the fuel tank.
  4. Connect the quick connect fittings (1) to the module cover. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Install the fuel tank module into the fuel tank.
  6. Place the lock ring into position.

  7. Object Number: 1642096  Size: SH

    Important: Always replace the fuel module seal when installing the fuel module. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Rotate the lock ring counterclockwise using the J 45722 until fully seated.
  9. Connect the fuel and EVAP lines to the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Install the fuel tank. Refer to Fuel Tank Replacement .

Fuel Tank Fuel Pump Module Replacement 1500 SWB - 98.4L (26 gal) Tank + E85

Tools Required

J 45722 Fuel Sender Lock Ring Wrench

Removal Procedure


    Object Number: 1704934  Size: SH
  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect fuel and evaporative emission (EVAP) lines from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Disconnect the EVAP vent valve line quick connect fitting at the vent valve and reposition the line out of the way. Refer to Plastic Collar Quick Connect Fitting Service .
  4. Notice: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    Important: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  5. Using the J 45722 and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  6. Remove the lock ring.

  7. Object Number: 1704935  Size: SH
  8. Carefully lift the module from the fuel tank enough to access the quick connect fitting (1) under the module cover. Disconnect the quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  9. Remove the fuel tank module.
  10. Remove and discard the fuel tank module seal.

  11. Object Number: 1617750  Size: SH

    Important: 

       • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
       • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
       • Check the lock ring for flatness.

  12. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  13. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  14. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

Installation Procedure


    Object Number: 1704935  Size: SH
  1. Install the NEW fuel tank module seal onto the fuel tank.
  2. Pull the vent line in the fuel tank up as far as possible for ease of installation.
  3. Position the fuel tank module part way into the fuel tank.
  4. Connect the quick connect fitting (1) to the module cover. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Install the fuel tank module into the fuel tank.
  6. Place the lock ring into position.

  7. Object Number: 1642096  Size: SH

    Important: Always replace the fuel module seal when installing the fuel module. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Rotate the lock ring counterclockwise using the J 45722 until fully seated.
  9. Position the EVAP vent valve line and connect the EVAP vent valve line quick connect fitting to the vent valve. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Connect the fuel and EVAP lines to the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  11. Install the fuel tank. Refer to Fuel Tank Replacement .

Fuel Tank Fuel Pump Module Replacement 1500 LWB - 117.3L (31 gal) Tank + E85

Tools Required

J 45722 Fuel Sender Lock Ring Wrench

Removal Procedure


    Object Number: 1705113  Size: SH
  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect fuel and evaporative emission (EVAP) lines from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Notice: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    Important: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  4. Using the J 45722 and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  5. Remove the lock ring.

  6. Object Number: 1704935  Size: SH
  7. Carefully lift the module from the fuel tank, enough to access the quick connect fitting (1) under the module cover. Disconnect the quick connect fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  8. Remove the fuel tank module.
  9. Remove and discard the fuel tank module seal.

  10. Object Number: 1617750  Size: SH

    Important: 

       • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
       • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
       • Check the lock ring for flatness.

  11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

Installation Procedure


    Object Number: 1704935  Size: SH
  1. Install a NEW fuel tank module seal onto the fuel tank.
  2. Pull the vent line in the fuel tank up as far as possible for ease of installation.
  3. Position the fuel tank module part way into the fuel tank.
  4. Connect the quick connect fitting (1) to the module cover. Refer to Plastic Collar Quick Connect Fitting Service .
  5. Install the fuel tank module into the fuel tank.
  6. Place the lock ring into position.

  7. Object Number: 1642096  Size: SH

    Important: Always replace the fuel module seal when installing the fuel module. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Rotate the lock ring counterclockwise using the J 45722 until fully seated.
  9. Connect the fuel and EVAP lines to the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Install the fuel tank. Refer to Fuel Tank Replacement .

Fuel Tank Fuel Pump Module Replacement 2500 LWB - 98.4L (26 gal) Tank-Front

Tools Required

J 45722 Fuel Sender Lock Ring Wrench

Removal Procedure


    Object Number: 1705661  Size: SH
  1. Remove the front fuel tank. Refer to Fuel Tank Replacement.
  2. Disconnect the fuel and evaporative emission (EVAP) lines from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  3. Notice: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    Important: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  4. Using the J 45722 and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  5. Remove the lock ring.

  6. Object Number: 1705662  Size: SH
  7. Carefully lift the fuel tank module from the fuel tank, enough to access the quick connect fitting (1) below the module cover. Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service.
  8. Remove the fuel tank module.
  9. Remove and discard the fuel tank module seal.

  10. Object Number: 1617750  Size: SH

    Important: 

       • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
       • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
       • Check the lock ring for flatness.

  11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

Installation Procedure


    Object Number: 1705662  Size: SH
  1. Install the NEW fuel tank module seal onto the fuel tank.
  2. Pull the vent line in the fuel tank up as far as possible for ease of installation.
  3. Position the fuel tank module part way into the fuel tank.
  4. Connect the quick connect fitting (1) to the module cover. Refer to Plastic Collar Quick Connect Fitting Service.
  5. Install the fuel tank module into the fuel tank.
  6. Place the lock ring into position.

  7. Object Number: 1642096  Size: SH

    Important: Always replace the fuel sender seal when installing the fuel sender assembly. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Rotate the lock ring counterclockwise using the J 45722 until fully seated.
  9. Connect the fuel and EVAP lines to the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service.
  10. Install the front fuel tank. Refer to Fuel Tank Replacement.

Fuel Tank Fuel Pump Module Replacement 2500 LWB - 43.5L (11.5 gal) Tank-Rear

Tools Required

J 45722 Fuel Sender Lock Ring Wrench

Removal Procedure


    Object Number: 1372822  Size: SH
  1. Remove the rear fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect the evaporative emission (EVAP) line quick connect fittings from the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service.
  3. Notice: Avoid damaging the lock ring. Use only J-45722 to prevent damage to the lock ring.

    Notice: Do Not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

    Important: Do NOT use impact tools. Significant force will be required to release the lock ring. The use of a hammer and screwdriver is not recommended. Secure the fuel tank in order to prevent fuel tank rotation.

  4. Using the J 45722 and a long breaker bar, rotate the ring clockwise unlocking the fuel tank module lock ring.
  5. Remove the lock ring.

  6. Object Number: 1372821  Size: SH
  7. Carefully lift the fuel tank module from the fuel tank enough to access the quick connect fittings below the module cover. Disconnect the quick connect fittings. Refer to Plastic Collar Quick Connect Fitting Service.
  8. Remove the fuel tank module.
  9. Remove and discard the fuel tank module seal.

  10. Object Number: 1617750  Size: SH

    Important: 

       • Some lock rings were manufactured with "DO NOT REUSE" stamped into them. These lock rings may be reused if they are not damaged or warped.
       • Inspect the lock ring for damage due to improper removal or installation procedures. If damage is found, install a NEW lock ring.
       • Check the lock ring for flatness.

  11. Place the lock ring on a flat surface. Measure the clearance between the lock ring and the flat surface using a feeler gage at 7 points.
  12. If warpage is less than 0.41 mm (0.016 in), the lock ring does not require replacement.
  13. If warpage is greater than 0.41 mm (0.016 in), the lock ring must be replaced.

Installation Procedure


    Object Number: 1372821  Size: SH
  1. Install a NEW fuel tank module seal onto the fuel tank.
  2. Pull the vent lines in the tank up as far as possible for ease of installation.
  3. Position the fuel tank module part way into the fuel tank.
  4. Connect the quick connect fittings to the module. Refer to Plastic Collar Quick Connect Fitting Service.
  5. Install the module into the fuel tank.
  6. Place the lock ring into position.

  7. Object Number: 1372822  Size: SH

    Important: Always replace the fuel sender seal when installing the fuel sender assembly. Replace the lock ring if necessary. DO NOT apply any type of lubrication in the seal groove.

    Ensure the lock ring is installed with the correct side facing upward. A correctly installed lock ring will only turn in a clockwise direction.

  8. Rotate the lock ring counterclockwise using the J 45722 until fully seated.
  9. Connect the EVAP line quick connect fittings to the fuel tank module. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Install the rear fuel tank. Refer to Fuel Tank Replacement .