GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Avalanche - 4WD 🢒 Transmission/Transaxle 🢒 Automatic Transmission - 4L80-E/4L85-E 🢒 Transmission Fluid Filler Tube and Seal Replacement

Removal Procedure
  1. Remove the intake manifold. Refer to Intake Manifold Replacement .

    2. Object Number: 1284301 Size: SH
  2. Unlock the transmission oil level indicator.
  3. Remove the transmission oil level indicator.
  4. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
  5. Support the transmission using a jack.
  6. Remove the transmission crossmember. Refer to Transmission Support Crossmember Replacement .

    7. Object Number: 858550 Size: SH
  7. Loosen the left exhaust pipe nuts

    8. Object Number: 858553 Size: SH
  8. Loosen the right exhaust pipe nuts

    9. Object Number: 1708338 Size: SH
  9. Remove the transmission heat shield.
  10. Lower the transmission slightly.

    11. Object Number: 1705096 Size: SH
  11. Disconnect the transmission oil cooler lines. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .
  12. Plug the transmission oil cooler line fittings.

    13. Object Number: 396797 Size: SH
  13. Remove the indicator tube nut.

    14. Object Number: 1284303 Size: SH
  14. Remove the indicator tube bolt, if equipped with RPO HP2.

    15. Object Number: 396798 Size: SH
  15. Remove the oil level indicator tube.
  16. Remove the seal from the transmission.

    17. Object Number: 1284302 Size: SH
  17. Remove the oil level indicator tube, if equipped with RPO HP2.
  18. Remove the seal from the transmission.

Installation Procedure

    Object Number: 1284302 Size: SH
  1. Install a NEW seal to the indicator tube.
  2. Install the oil level indicator tube, if equipped with RPO HP2.

    3. Object Number: 396798 Size: SH
  3. Install a NEW seal to the indicator tube.
  4. Install the oil level indicator tube.

    5. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1284303 Size: SH
  5. Install the indicator tube bolt, if equipped with RPO HP2.

    6. Tighten
    Tighten the bolt to 22 N·m (16 lb ft).


    Object Number: 396797 Size: SH
  6. Install the indicator tube nut.

    7. Tighten
    Tighten the nut to 22 N·m (16 lb ft).


    Object Number: 1705096 Size: SH
  7. Remove the plugs from the transmission oil cooler line fittings.
  8. Connect the transmission oil cooler lines. Refer to Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection .

    9. Object Number: 1708338 Size: SH
  9. Install the transmission heat shield.

    10. Tighten
    Tighten the bolts to 17 N·m (12 lb ft).

  10. Raise the transmission.

    11. Object Number: 858553 Size: SH
  11. Tighten the right exhaust pipe nuts

    12. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).


    Object Number: 858550 Size: SH
  12. Tighten the left exhaust pipe nuts

    13. Tighten
    Tighten the nuts to 50 N·m (37 lb ft).

  13. Install the transmission crossmember. Refer to Transmission Support Crossmember Replacement .
  14. Remove the transmission jack.
  15. Lower the vehicle.

    16. Object Number: 1284301 Size: SH
  16. Install the transmission oil level indicator.
  17. Lock the transmission oil level indicator.
  18. Install the intake manifold. Refer to Intake Manifold Replacement .