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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Frame And Underbody) >> Repair Instructions >> Rear Suspension Cradle Removal and Installation (L3B RWL) >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
  1. Set the parking brake in Service Mode.
    1. Install a scan tool.
    2. Turn the ignition ON with engine OFF
    3. Select Electronic Brake Control Module.
    4. Select Control Functions.
      5. NOTE:

      Do NOT apply any brake pressure during this step.

    5. Select Rear Brake Caliper Piston Retract.
  2. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection
  3. Raise and support the vehicle. Lifting and Jacking the Vehicle
  4. Remove the rear tire and wheel assemblies. Tire and Wheel Removal and Installation
  5. GM5424015Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector Bolt (1) - Remove [2x]

  6. Rear Tire Front Air Deflector- Left Side (2) - Remove
  7. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Bolt (1) - Remove

  8. Underbody Rear Air Deflector Plastic Nut (2) - Remove [3x]
  9. Underbody Rear Air Deflector Bolt (3) - Remove [3x]
  10. Underbody Rear Air Deflector Nut (4) - Remove [2x]
  11. Underbody Rear Air Deflector- Left Side (5) - Remove
  12. GM5424018Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector Bolt (1) - Remove [2x]

  13. Rear Tire Front Air Deflector- Right Side (2) - Remove
  14. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Rear Wheelhouse Liner Bolt (1) - Remove

  15. Underbody Rear Air Deflector Bolt (2) - Remove [3x]
  16. Underbody Rear Air Deflector Plastic Nut (3) - Remove [3x]
  17. Underbody Rear Air Deflector Nut (4) - Remove [2x]
  18. Underbody Rear Air Deflector- Right Side (5) - Remove
  19. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Remove [6x]

  20. Floor Panel Reinforcement (2) - Remove
  21. GM5309188Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Remove [2x]

  22. GM5309202Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Separate

  23. Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Left Side (3) - Separate
  24. GM5309211Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Separate

  25. Exhaust Muffler (1) @ Exhaust Rear Muffler Insulator-Right Side (3) - Separate
  26. GM5309214Courtesy of GENERAL MOTORS COMPANY

    With the aid of an assistant, remove the exhaust muffler (1) from the vehicle.

  27. Catalytic Converter Gasket (2) - Remove and DISCARD
  28. GM5309833Courtesy of GENERAL MOTORS COMPANY

    Exhaust Heat Shield Bolt (1) - Remove [6x]

  29. Exhaust Intermediate Underbody Heat Shield (2) - Remove
  30. GM5334717Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 2 Cross Bar Reinforcement Bolt (1) - Remove [4x]

  31. Floor Panel Number 2 Cross Bar Reinforcement (2) - Remove
  32. GM5317834Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft Hub Clamp (1) - Remove and DISCARD

  33. GM5317835Courtesy of GENERAL MOTORS COMPANY

    Mark (2) the relationship of the propeller shaft to the rear differential flange using a paint pen.

    34. CAUTION:

    When removing the propeller shaft, do not remove the propeller shaft coupler from the propeller shaft assembly. The only bolts that should be removed are those that mount each coupler to the transmission output flange, and to the rear drive axle input flange. Failure to properly remove the propeller shaft assembly may cause coupler damage, resulting in necessary replacement of the entire propeller shaft.

  34. Rear Propeller Shaft Nut (3) - Remove [3x]
  35. Rear Propeller Shaft Bolt (1) - Remove [3x]
  36. Support and secure the propeller shaft to a suitable hydraulic jack stand.
  37. GM5317838Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft Bearing Support Bolt (1) - Remove [2x]

  38. GM5317841Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft (1) - Remove

  39. GM5316676Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Wheel Speed Sensor Bolt- Left Side and Right Side (1) @ Rear Suspension Knuckle - Remove [2x]

  40. Rear Wheel Speed Sensor- Left Side and Right Side (2) @ Rear Suspension Knuckle - Remove [2x]
  41. GM5334525Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Remove the 8 rear spring pins (1) on the left and right sides of the rear suspension lower control arm covers.

  42. Rear Suspension Lower Control Arm Cover- Left Side and Right Side (2) - Remove [2x]
  43. GM5420645Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    CAUTION:

    Support the brake caliper with heavy mechanic wire, or equivalent, whenever it is separated from its mount and the hydraulic flexible brake hose is still connected. Failure to support the caliper in this manner will cause the flexible brake hose to bear the weight of the caliper, which may cause damage to the brake hose and in turn may cause a brake fluid leak.

    NOTE:

    Do NOT disconnect the hydraulic brake flexible hose from the caliper.

    Rear Brake Caliper Bracket Bolt- Left Side and Right Side (1) - Remove [4x]

  44. Remove the left and right rear brake caliper and bracket (2) and support with heavy mechanics wire.
  45. GM5335007Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Place a jack under the left and right rear suspension lower control arms.

  46. Rear Shock Absorber Bolt- Left Side and Right Side (2) @ Rear Suspension Lower Control Arm (3) - Remove and DISCARD [2x]
  47. Mark rear coil springs for proper installation.
  48. GM5337541Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Lower Control Arm Outer Nut- Left Side and Right Side (1) - Remove [2x]

  49. Using the jack stand, raise the rear lower control arms enough to aid in the removal of the of the rear suspension lower control arm outer bolts.
  50. Rear Suspension Lower Control Arm Outer Bolt- Left Side and Right Side (3) - Remove and DISCARD [2x]
  51. GM5504134Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Lower Control Arm Inner Nut- Left Side and Right Side (1) - Loosen [2x]

  52. GM5504136Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Left side shown, right side similar.
    • Observe the orientation of rear coil spring (1) as it will be dislodged upon removal of the rear suspension lower control arm.

    Slowly raise the vehicle to release tension on the rear coil spring (1) and swing the rear suspension lower control arm (2) far enough to gain access to the rear coil spring (1) for removal.

  53. GM5504137Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Lower Control Arm Inner Nut- Left Side and Right Side (1) - Remove [2x]

  54. Rear Suspension Lower Control Arm Inner Washer- Left Side and Right Side (2) - Remove [2x]
  55. Rear Suspension Lower Control Arm Inner Bolt- Left Side and Right Side (3) - Remove and DISCARD [2x]
  56. GM5504138Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Lower Control Arm- Left Side and Right Side (1) - Remove [2x]

  57. GM5590590Courtesy of GENERAL MOTORS COMPANY

    Using a suitable jack stand (1), support the rear differential carrier.

  58. GM5590838Courtesy of GENERAL MOTORS COMPANY

    Position a block of wood (1) and a suitable jack stand (2) between the frame of the vehicle and the rear suspension bracket on the left side.

  59. GM5591038Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    DO NOT raise the vehicle higher than necessary.

    Using the block of wood and a suitable jack stand (1), raise the vehicle just enough to reposition the hoist pad (2) from under the vehicle.

  60. GM5442507Courtesy of GENERAL MOTORS COMPANY

    Rear Suspension Bracket Bolt- Left Side (1) - Remove

  61. Rear Suspension Bracket Bolt- Left Side (4) - Remove
  62. Rear Suspension Cradle Front Bolt- Left Side (3) - Remove
  63. Rear Suspension Bracket- Front- Left Side (2) - Remove

    DO NOT ATTEMPT OTHER REPAIRS WITH JACK STANDS IN PLACE.

  64. GM5893523Courtesy of GENERAL MOTORS COMPANY

    Reinstall the left side rear suspension cradle front bolt (1).

  65. Position the hoist pad back onto body flange between the rear suspension bracket fastener holes, lower the vehicle onto the hoist and remove the jack stand.
  66. GM5590838Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Position the block of wood (1) and the suitable jack stand (2) between the frame of the vehicle and the rear suspension bracket on the right side.

  67. GM5591038Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Left side shown, right side similar.
    • DO NOT raise the vehicle higher than necessary.

    Using the block of wood and a suitable jack stand (1), raise the vehicle just enough to reposition the hoist pad (2) from under the vehicle.

  68. GM5442507Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Bracket Bolt- Right Side (1) - Remove\

  69. Rear Suspension Bracket Bolt- Right Side (4) - Remove
  70. Rear Suspension Cradle Front Bolt- Right Side (3) - Remove
  71. Rear Suspension Bracket- Front- Right Side (2) - Remove

    DO NOT ATTEMPT OTHER REPAIRS WITH JACK STANDS IN PLACE.

  72. GM5893525Courtesy of GENERAL MOTORS COMPANY

    Reinstall the right side rear suspension cradle front bolt (1).

  73. Position the hoist pad back onto body flange between the rear suspension bracket fastener holes, lower the vehicle onto the hoist and remove the jack stand.
  74. GM5590590Courtesy of GENERAL MOTORS COMPANY

    Remove the jack stand (1), from the rear differential carrier.

  75. GM5336324Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Rear Suspension Bracket Nut- Left Side and Right Side (1) - Remove [4x]

  76. Rear Suspension Bracket- Left Side and Right Side (2) - Remove [2x]
  77. Position lift table under rear suspension cradle.
  78. Rear Suspension Cradle Front Bolt- Left Side and Right Side - Remove [2x]
  79. GM5893555Courtesy of GENERAL MOTORS COMPANY

    Rear Suspension Cradle Rear Bolt (1) - Remove and DISCARD [2x]

  80. GM5668915Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Remove the cradle with the suspension links and components attached as shown.

    Lower the rear suspension cradle 6 - 8 inches and disconnect any remaining electrical connectors and retainers.

  81. Rear Suspension Cradle (1) - Remove
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