GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2008 🢒 Lucerne 🢒 Transmission/Transaxle 🢒 Automatic Transaxle - 4T65-E 🢒 Control Valve Body Cover Replacement

Removal Procedure

    Object Number: 1679762 Size: SH
  1. Remove the engine sight shield.
  2. Remove the air cleaner intake duct. Refer to Air Cleaner Assembly Replacement .

    3. Object Number: 772540 Size: SH
  3. Remove the range selector cable from the range selector lever.
  4. Remove the range selector cable bracket nuts.
  5. Remove the range selector cable bracket from the transmission case and set aside.

    6. Object Number: 678825 Size: SH
  6. Disconnect the transaxle electrical connector C100 (2).
  7. Disconnect the wiring harness (3) from the wiring harness retainer (1) on the transaxle.
  8. Remove the upper transmission case side cover bolt.
  9. Install the engine support fixture. Refer to Engine Support Fixture .
  10. Raise and Support the vehicle. Refer to Lifting and Jacking the Vehicle .
  11. Remove the left front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .

    12. Object Number: 1679758 Size: SH
  12. Remove the left inner wheelhouse liner (1). Refer to Front Wheelhouse Liner Replacement .
  13. Remove the front air deflector. Refer to Front Air Deflector Replacement .
  14. Remove the left ball joint from the steering knuckle. Refer to Lower Control Arm Replacement .

    15. Object Number: 337379 Size: SH
  15. Remove the stabilizer bar links. Refer to Stabilizer Shaft Link Replacement .
  16. Rotate the stabilizer bar to gain access to the power steering mounting bolts.
  17. Remove the power steering gear mounting bolts.
  18. Remove the power steering line retainers from the frame.
  19. Secure the power steering gear to the vehicle body.

    20. Object Number: 1679761 Size: SH
  20. Remove the mounting bolt (2) in order to allow removal of the brake pressure modulator valve from the bracket.
  21. Remove the brake line retainers (1) from the frame.

    22. Object Number: 1679765 Size: SH
  22. Remove the lower nuts (1-3) from the powertrain mounts.
  23. Support the left side of the frame with an appropriate jack.

    24. Object Number: 105376 Size: SH
  24. Remove the three frame-to-body bolts (3) on the left side.

    25. Important: DO NOT loosen the front and rear frame-to-body bolts on the right side.

  25. Loosen, but do not remove, the right center frame-to-body bolt.

    26. Important: Ensure that all pipes, hoses and wires are clear and not being bound or stressed when lowering the frame.

  26. Lower the left side of the frame.
  27. Lower the vehicle enough to gain access to the engine support fixture.
  28. Using the engine support fixture, lower the transaxle.
  29. Raise the vehicle.
  30. Position an oil drain pan under the left side of the transaxle.
  31. Remove the left drive axle from the transaxle. Refer to Wheel Drive Shaft Replacement .

    32. Object Number: 164786 Size: SH
  32. Remove the case side cover bolts.

    33. Object Number: 48208 Size: SH
  33. Remove the case side cover (53).
  34. If replacing the side cover, remove the transmission mount bracket. Refer to Transmission Mount Bracket Replacement - Left Side .
  35. Clean the case and side cover gasket surfaces.

Installation Procedure

    Object Number: 48208 Size: SH
  1. Assemble the case side cover inner gasket (59) to the case side cover (53). Use J 36850 on the seal surfaces.
  2. Install the case side cover gasket (54) and case side cover (53) onto the case. Make sure the gaskets and electrical connector are positioned correctly.

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


    Object Number: 164786 Size: SH
  3. Install the transmission side case bolts.

    4. Tighten
    Tighten all bolts to 25 N·m (18 lb ft).

  4. If removed, install the transmission mount bracket. Refer to Transmission Mount Bracket Replacement - Left Side .
  5. Install the drive axle into the transaxle. Refer to Wheel Drive Shaft Replacement .
  6. Lower the vehicle enough to gain access to the engine support fixture.
  7. Using the engine support fixture, raise the transaxle to the original position.
  8. Raise the vehicle.
  9. Using an appropriate jack. Carefully raise the left side of the frame so that the frame-to-body bolts can be installed.

    10. Object Number: 105376 Size: SH
  10. Using 16 mm (0.630 in) dowel pins in the alignment holes (1), align the engine frame (2) with the body.
  11. Install the frame-to-body bolts (3).

    12. Tighten
    Tighten the bolts to 112 N·m (83 lb ft).

  12. Remove the jack stand and oil drain pan.

    13. Object Number: 1679765 Size: SH
  13. Install the lower powertrain mount nuts (2, 3).

    14. Tighten
    Tighten the nut to 70 N·m (52 lb ft).

  14. Install the two left transaxle mount nuts (1).

    15. Tighten
    Tighten the nut to 50 N·m (37 lb ft).


    Object Number: 1679761 Size: SH
  15. Position the brake pressure modulator valve into the bracket and install the mounting bolt (2).

    16. Tighten
    Tighten the bolt to 10 N·m (89 lb in).

  16. Install the brake line retainers (1) onto the frame.

    17. Object Number: 337379 Size: SH
  17. Install the power steering gear mounting bolts.

    18. Tighten
    Tighten the bolts to 70 N·m (95 lb ft).

  18. Install the power steering line retainers onto the frame.
  19. Install the ball joint into the steering knuckle. Refer to Lower Control Arm Replacement .
  20. Install the stabilizer bar links. Refer to Stabilizer Shaft Link Replacement .
  21. Install the front air deflector. Refer to Front Air Deflector Replacement .

    22. Object Number: 1679758 Size: SH
  22. Install the left inner wheelhouse liner (1). Refer to Front Wheelhouse Liner Replacement .
  23. Install the left front tire and wheel assembly. Refer to Tire and Wheel Removal and Installation .
  24. Lower the vehicle.
  25. Remove the engine support fixture.
  26. Install the upper transmission side case bolt.

    27. Tighten
    Tighten all bolts to 25 N·m (18 lb ft).


    Object Number: 678825 Size: SH
  27. Connect the transaxle electrical connector C100 (2).
  28. Install the wiring harness (3) into the wiring harness retainer (1) on the transaxle.

    29. Object Number: 772540 Size: SH
  29. Install the range selector cable bracket to the transmission case.
  30. Install the range selector cable bracket nuts.

    31. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).

  31. Install the range selector cable to the range selector lever.
  32. Check adjustment of the range selector cable. Re-adjust as needed. Refer to Range Selector Lever Cable Adjustment .

    33. Object Number: 1679762 Size: SH
  33. Install the engine sight shield.
  34. Install the air cleaner intake duct. Refer to Air Cleaner Assembly Replacement .
  35. Fill the transaxle to the proper level. Refer to Fluid Capacity Specifications .
  36. Inspect the transaxle fluid level. Refer to Transmission Fluid Check .
  37. Inspect for fluid leaks.