LaCrosse 2006-2007

Removal & Installation

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  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Raise and support the vehicle.
  4.  
  5. Place a drain pan under the vehicle.
  6.  
  7. Remove the tire and wheel assemblies.
    CAUTION
    Failure to disconnect the intermediate shaft from the rack and pinion stub shaft can result in damage to the steering gear and/or intermediate shaft. This damage can cause loss of steering control which could result in personal injury.


    WARNING
    Set steering shaft so the block tooth on the upper steering shaft is at the 12 o'clock position, the wheels on the vehicle are straight ahead and set the ignition switch to the LOCK position. Failure to follow these procedures could result in damage to the coil.


    WARNING
    The wheels of the vehicle must be straight ahead and the steering column in the LOCK position before disconnecting the steering column or intermediate shaft from the steering gear. Failure to do so will cause the SIR coil assembly to become un-centered, which may cause damage to the coil assembly.



    Click image to see an enlarged view

    Fig. Disconnect the intermediate steering shaft (1) from the power steering gear stub shaft (2)

  8.  
  9. Remove the lower pinch bolt from the power steering gear stub shaft.

    Click image to see an enlarged view

    Fig. Insert tool J 42640 into the steering column access hole in order to lock the steering column

  10.  
  11. Insert tool J 42640 into the steering column access hole in order to lock the steering column. This will maintain the correct orientation.
  12.  
  13. Remove the intermediate steering shaft from the power steering gear stub shaft.

    Click image to see an enlarged view

    Fig. Separating the tie rod end from the knuckle

  14.  
  15. Remove both of the tie rod ends from the steering knuckles.
  16.  
  17. Support the rear of the frame using jackstands.

    Click image to see an enlarged view

    Fig. Remove the frame bolts from the rear of the frame

  18.  
  19. Remove the frame bolts from the rear of the frame. Refer to Engine Removal & Installation.
    WARNING
    Do not lower the rear of the frame too far as damage to the engine components nearest to the cowl may result.

  20.  
  21. Lower the rear of the frame.
  22.  
  23. Remove the power steering pressure hose from the power steering gear.
  24.  
  25. Remove the power steering return hose from the power steering gear.
  26.  
  27. Remove the Magnasteer Variable Assist electrical connector from the power steering gear assembly, if equipped with variable effort steering.
  28.  
  29. Remove the power steering gear mounting bolts and nuts.
  30.  
  31. Remove the power steering gear through the left wheel opening.

    Click image to see an enlarged view

    Fig. Steering gear mounting

  32.  

To install:

  1. Install the power steering gear through the left wheel opening.
  2.  
  3. Install the power steering gear mounting bolts and nuts. Tighten the power steering gear mounting bolts to 66 ft. lbs. (90 Nm).
  4.  
  5. Inspect the threads on the power steering pressure hose and the power steering return hose.
  6.  
  7. Inspect the O-ring seals on the power steering hoses.
  8.  
  9. Replace the seals if damaged, lubricate the seals before installation.
  10.  
  11. Install the clamp that holds the power steering hoses to the power steering gear.
  12.  
  13. Install the Magnasteer Variable Assist electrical connector to the power steering gear assembly, if equipped with variable effort steering.
  14.  
  15. Install the power steering pressure hose to the power steering gear. Tighten the power steering pressure hose to power steering gear. Tighten the pressure hose fittings to 20 ft. lbs. (27 Nm).
  16.  
  17. Install the power steering return hose to the power steering gear. Tighten the fitting to 20 ft. lbs. (27 Nm).
  18.  
  19. Raise the frame into position.
  20.  
  21. Install rear frame bolts. Tighten the rear bolts to 118 ft. lbs. (160 Nm).
  22.  
  23. Remove the jackstands.
  24.  
  25. Install the tie rod ends to the steering knuckles. Tighten the nut to 34 ft. lbs. (30 Nm) plus 120°. Inspect to ensure that 2 1 / 2 -4 1 / 2 threads are visible above the nylon washer.
    WARNING
    Set steering shaft so the block tooth on the upper steering shaft is at the 12 o'clock position, the wheels on the vehicle are straight ahead and set the ignition switch to the LOCK position. Failure to follow these procedures could result in damage to the coil.


    NOTE
    During the installation of the intermediate steering shaft, ensure the steering shaft is seated before you install the pinch bolt. The two mating shafts may disengage if the pinch bolt is inserted into the coupling before the steering shaft installation.

  26.  
  27. Raise and support the vehicle.
  28.  
  29. Install the intermediate steering shaft to the power steering gear stub shaft.
  30.  
  31. Install the lower pinch bolt to the intermediate steering shaft at the power steering gear stub shaft. Tighten the pinch bolt to 35 ft. lbs. (48 Nm).
  32.  
  33. Install the intermediate steering shaft seal onto the power steering gear.
  34.  
  35. Install the tire and wheel assemblies.
  36.  
  37. Remove the drain pan from under the vehicle.
  38.  
  39. Lower the vehicle.
  40.  
  41. Remove tool J 42640 from the steering column.
  42.  
  43. Fill the power steering system with power steering fluid.
  44.  
  45. Bleed the power steering system:
    WARNING
    When adding fluid or making a complete fluid change, always use the proper power steering fluid. Failure to use the proper fluid will cause hose and seal damage and fluid leaks.


    NOTE
    Use clean, new power steering fluid type only. See the Maintenance and Lubrication subsection for fluid specifications. Hoses touching the frame, body, or engine may cause system noise. Verify that the hoses do not touch any other part of the vehicle. Loose connections may not leak, but could allow air into the steering system. Verify that all hose connections are tight.


    NOTE
    Maintain the fluid level throughout the bleed procedure

    1. Remove the pump reservoir cap.
    2.  
    3. Fill the pump reservoir with fluid to the FULL COLD level.
    4.  
    5. Attach a vacuum pump and adapter to the reservoir.
    6.  
    7. Apply a vacuum of 68 kPa (20 in Hg) maximum.
    8.  
    9. Wait 5 minutes. Typical vacuum drop is 7-10 kPa (2-3 in Hg).
    10.  
    11. Remove the vacuum pump and adapter.
    12.  
    13. Reinstall the pump reservoir cap.
    14.  
    15. Start the engine. Allow the engine to idle.
    16.  
    17. Turn OFF the engine.
    18.  
    19. Verify the fluid level. Repeat steps 8-10 until the fluid stabilizes.
      NOTE
      Do NOT turn the steering wheel to LOCK.

    20.  
    21. Start the engine. Allow the engine to idle.
    22.  
    23. Turn the steering wheel 180-360° in both directions 5 times.
    24.  
    25. Turn OFF the ignition.
    26.  
    27. Verify the fluid level.
    28.  
    29. Remove the pump reservoir cap.
    30.  
    31. Attach a vacuum pump and adapter to the reservoir.
    32.  
    33. Apply a vacuum of 68 kPa (20 in. Hg) maximum.
    34.  
    35. Wait 5 minutes.
    36.  
    37. Remove the vacuum pump and adapter.
    38.  
    39. Verify the fluid level.
    40.  
    41. Reinstall the pump reservoir cap.
    42.  

  46.  
  47. Inspect the power steering system for leaks.
  48.  
  49. Perform a front end alignment.
  50.  

 
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