GM Service Manual Online
For 1990-2009 cars only

Oil Cooler Pipes Replacement Rear Section

Removal Procedure

The hose portion of the pipes can be replaced without replacing the entire pipe. Install the replacement hose using clamps of the appropriate size.

The rear pipe on the transmission feeds to the oil cooler. The front pipe on the transmission returns fluid to the transmission.

Rear Section

  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 159415  Size: MH
  3. Remove the center oil cooler hoses inlet and outlet pipe hoses from oil cooler inlet and outlet pipes.
  4. • Squeeze the clamps away from connection.
    • Slide the clamps away from the connection.
    • Remove the hoses from pipes.

    Object Number: 159410  Size: SH
  5. Remove the retainer from oil cooler inlet and outlet pipes.
  6. Remove the oil cooler inlet pipe fitting and seals (2) from transmission. Discard seals.
  7. Remove the oil cooler inlet pipe from transmission.
  8. Remove oil cooler outlet pipe fitting from transmission.
  9. Remove oil cooler outlet pipe from transmission.

Installation Procedure


    Object Number: 159410  Size: SH
  1. Install the oil cooler outlet pipe to transmission.
  2. Install the oil cooler outlet pipe fitting to transmission.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten
    Tighten the oil cooler outlet pipe fitting to 30 N·m (22 lb ft).

  4. Install the oil cooler inlet pipe to transmission.
  5. Install the oil cooler pipe seals inlet fitting.
  6. Tighten
    Tighten the oil cooler inlet pipe fitting to 25 N·m (18 lb ft).

  7. Install the retainer to oil cooler inlet and outlet pipes.
  8. Install the center oil cooler inlet and outlet pipe hoses to oil cooler inlet and outlet pipes.
  9. • Connect the hoses to pipes.
    • Squeeze the clamps.
    • Slide the clamps into position.
  10. Lower the vehicle.
  11. Check the transmission fluid level. Refer to Transmission Fluid Check .

Oil Cooler Pipes Replacement Middle Section

Removal Procedure


    Object Number: 159417  Size: SH
  1. Remove the air filter housing.
  2. 1.1. Remove the cover.
    1.2. Remove the element.
    1.3. Unseat from the inner grommets (2). Then from the outer grommets (1).
  3. Remove the generator cooling duct.
  4. Remove the fuel vapor fresh air inlet hose. This hose connects to the fuel vapor filter (passenger side of engine compartment) extends down and wraps around the center inlet and outlet pipes.

  5. Object Number: 159421  Size: SH
  6. Remove the center inlet and outlet pipe hoses from pipe (5) at radiator.
  7. 4.1. Squeeze the clamps
    4.2. Slide away from connection
    4.3. Disconnect the hoses from pipe
  8. Remove the center inlet and outlet pipes from upper retainers on body.
  9. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  10. Remove the center inlet and outlet pipe hoses from inlet and out pipes.
  11. 7.1. Squeeze the clamps
    7.2. Slide away from connection
    7.3. Remove the hoses from pipes
  12. Remove the pipes from retainer on body.
  13. Remove the pipes from vehicle. Remove pipes from bottom of vehicle.

Installation Procedure


    Object Number: 159421  Size: SH
  1. Install the pipes (1, 2) to the vehicle. Install pipes from bottom of vehicle.
  2. Install the pipes to retainer on body.
  3. Install the inlet and outlet pipe hoses to oil cooler inlet and outlet pipes.
  4. • Position the hoses on the pipes
    • Squeeze the clamps
    • Slide the clamps over the hoses
  5. Lower the vehicle.
  6. Install the center inlet and outlet pipes to retainers on body.
  7. Install the center inlet and outlet pipe hoses to pipe at radiator.
  8. • Position the hoses to pipes
    • Squeeze the clamps
    • Slide the clamps into position
  9. Install the fuel vapor fresh air inlet hose. This hose connects to the fuel vapor filter (passenger side of engine compartment) extends down and wraps around the fluid cooler lines.
  10. Install the generator cooling duct.

  11. Object Number: 159417  Size: SH
  12. Install the air filter housing.
  13. • Seat the housing onto the grommets (2). Then to inner grommet (1).
    • Install the element.
    • Install the cover.
  14. Check the transmission fluid level. Refer to Transmission Fluid Check .

Oil Cooler Pipes Replacement Front Section

Removal Procedure


    Object Number: 159417  Size: SH
  1. Remove the air filter housing.
  2. • Remove the cover.
    • Remove the element.
    • Unseat from the grommets (1, 2).
  3. Remove the generator cooling duct.
  4. Remove the center inlet and outlet pipe hoses from oil cooler pipe.
  5. • Squeeze the clamps.
    • Slide the clamps away from the connection.
    • Disconnect the hoses from pipe.
  6. Remove the upper pipe fitting and seals from radiator. Discard seals.
  7. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  8. Remove the lower pipe fitting and seals from radiator. Discard seals.

  9. Object Number: 159582  Size: SH
  10. Remove the front oil cooler pipe (3) from vehicle.

Installation Procedure


    Object Number: 159582  Size: SH
  1. Install the front oil pipe (3) to vehicle.
  2. Install the lower pipe fitting and new seals to radiator.
  3. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

    Tighten
    Tighten the lower pipe fitting to 25 N·m (18 lb ft).

  4. Lower the vehicle.
  5. Install the upper pipe fitting and new seals to radiator.
  6. Install the upper pipe fitting bolt.
  7. Tighten
    Tighten the upper pipe fitting to 25 N·m (18 lb ft).

  8. Install the center oil cooler pipe hoses to pipe.
  9. • Install the hoses to pipes.
    • Squeeze the clamps.
    • Slide the clamps into position.
  10. Install the generator cooling duct.

  11. Object Number: 159417  Size: SH
  12. Install the air filter housing.
  13. • Seat the housing onto the grommets (1, 2).
    • Install the element.
    • Install the cover.
  14. Check the transmission fluid level. Refer to Transmission Fluid Check .