GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Avalanche - 4WD 🢒 Transmission 🢒 Automatic Transmission - 6L50/6L80/6L90 🢒 Transmission Fluid Cooler Hose/Pipe Replacement

Removal Procedure
  1. Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement.
  2. Remove the front upper fascia support fasteners in order to tip the bracket back. Refer to Front Upper Fascia Support Bracket Replacement.

    3. Object Number: 396817 Size: SH
  3. Remove the transmission fluid cooler hose from the auxiliary oil cooler. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  4. Remove the transmission fluid cooler hose from the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  5. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  6. Remove the engine protection shield. Refer to Engine Shield Replacement.

    7. Object Number: 1705099 Size: SH
  7. Remove the cooling lines from the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

    8. Object Number: 1751768 Size: SH
  8. Remove the right differential carrier mounting nuts and washers.

    9. Object Number: 1761077 Size: SH

    Caution: Do not use air powered tools in order to disassemble or assemble any vehicle component. Bolt torques are vital to diagnosis. You can detect bolt torques only when using hand tools. Improper bolt torques can contribute to vehicle repair problems.

  9. Remove the right front shock rear mounting bolt only from the lower control arm.
  10. Remove the oil cooling lines rearward from the vehicle.

Installation Procedure

    Object Number: 1705099 Size: SH
  1. Install the transmission oil cooler lines to the vehicle.

    2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1761077 Size: SH

    Caution: Do not use air powered tools in order to disassemble or assemble any vehicle component. Bolt torques are vital to diagnosis. You can detect bolt torques only when using hand tools. Improper bolt torques can contribute to vehicle repair problems.

  2. Install the right shock rear mounting bolt on the lower control arm.

    3. Tighten
    Tighten the bolt to 50N·m (37 lb ft).


    Object Number: 1751768 Size: SH
  3. Install the right differential carrier mounting nuts and washers.

    4. Tighten
    Tighten the mounting nuts to 100N·m (75 lb ft).

  4. Install the cooling lines to the transmission. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.

    5. Object Number: 396817 Size: SH
  5. Install the engine protection shield. Refer to Engine Shield Replacement.
  6. Lower the vehicle.
  7. Install the transmission fluid cooler hose to the radiator. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  8. Install the transmission fluid cooler hose to the auxiliary oil cooler. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection.
  9. Install the front upper fascia support bracket. Refer to Front Upper Fascia Support Bracket Replacement.
  10. Install the front bumper fascia. Refer to Front Bumper Fascia Replacement.