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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Engine Controls And Fuel - 3.6L (LF4) - Repair Instructions (1 Of 3)) >> Repair Instructions >> Fuel Tank Fuel Pump Module Replacement (MHU) >> Installation Procedure

Installation Procedure

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  1. GM5831534Courtesy of GENERAL MOTORS COMPANY

    Fuel Hose (4) - Connect - Plastic Collar Quick Connect Fitting Service 

  2. Fuel Sender (3) - Connect [2x] - Plastic Collar Quick Connect Fitting Service 
  3. Fuel Tank Vent Hose (2) - Connect - Plastic Collar Quick Connect Fitting Service 
  4. Electrical Connector (1) - Connect
  5. GM5831533Courtesy of GENERAL MOTORS COMPANY

    Fuel Pump Seal (2) - Install NEW

  6. Fuel Tank Fuel Pump Module (1) - Install
  7. GM5831532Courtesy of GENERAL MOTORS COMPANY

    Fuel Sender Retainer (1) - Install - CH - 45722  Fuel Sender Lock Ring Wrench (2)

  8. GM5831531Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Hose (4) - Connect - Plastic Collar Quick Connect Fitting Service 

  9. Fuel Tank Filler Evaporative Emission Valve Hose (3) - Connect - Plastic Collar Quick Connect Fitting Service 
  10. Fuel Pump Fuel Feed Hose (2) - Connect - Plastic Collar Quick Connect Fitting Service 
  11. Fuel Sender Wiring Harness (1) - Connect [3x]
  12. GM5845779Courtesy of GENERAL MOTORS COMPANY

    Place a suitable adjustable jack under the fuel tank.

  13. Fuel Tank (1) - Install
  14. GM5845778Courtesy of GENERAL MOTORS COMPANY

    Fuel Tank Strap (2) - Install [2x]

  15. CAUTION:

    Refer to Fastener Caution .

  16. Fuel Tank Strap Bolt (1) - Install and tighten [5x] - Fastener Specifications
  17. Remove the jack.
  18. GM5845777Courtesy of GENERAL MOTORS COMPANY

    Fuel Tank Vent Hose (5) - Connect - Plastic Collar Quick Connect Fitting Service 

  19. Fuel Tank Filler Evaporative Emission Valve Hose (4) - Connect - Plastic Collar Quick Connect Fitting Service 
  20. Evaporative Emission Canister Purge Hose (3) - Connect - Plastic Collar Quick Connect Fitting Service 
  21. Fuel Tank Filler Hose (2) - Install
  22. Fuel Tank Filler Hose Clamp (1) - Tighten - Fastener Specifications
  23. GM5845776Courtesy of GENERAL MOTORS COMPANY

    Fuel Pump Fuel Feed Hose (2) - Connect - Plastic Collar Quick Connect Fitting Service 

  24. Fuel Tank Vent Valve Hose (1) - Connect - Plastic Collar Quick Connect Fitting Service 
  25. GM5845775Courtesy of GENERAL MOTORS COMPANY

    Retainer (2) - Engage [5x]

  26. Fuel Sender Wiring Harness (1) - Connect [2x]
  27. GM5864749Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Auxiliary Cooler Outlet Pipe (2) - Install

  28. Transmission Fluid Auxiliary Cooler Outlet Pipe (2) - Connect
  29. Retaining Clip (3) - Engage
  30. Transmission Fluid Cooler Pipe Clip (1) - Engage [2x]
  31. GM5865268Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Auxiliary Cooler Inlet Pipe (2) - Install

  32. Transmission Fluid Auxiliary Cooler Inlet Pipe (2) - Connect
  33. Retaining Clip (3) - Engage
  34. Transmission Fluid Cooler Pipe Clip (1) - Engage [2x]
  35. GM5864353Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Inlet and Outlet Pipe (2) @ Transmission Fluid Auxiliary Cooler Outlet Pipe (4) - Connect

  36. Transmission Fluid Cooler Inlet and Outlet Pipe (2) @ Transmission Fluid Auxiliary Cooler Inlet Pipe (1) - Connect
  37. Retaining Clip (3) - Engage [2x]
  38. GM5863854Courtesy of GENERAL MOTORS COMPANY

    Position the propeller shaft (1) in the vehicle.

  39. GM5863691Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation.
  40. Install the 2 propeller shaft bearing support bolts (1) and tighten. Fastener Specifications
  41. GM5863695Courtesy of GENERAL MOTORS COMPANY

    Align the reference mark (3) between the propeller shaft flange (1) and the rear axle pinion flange (2).

  42. GM5863697Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation.
  43. Install the 3 rear propeller shaft nuts (2) and the 3 rear propeller shaft bolts (1).
  44. Tighten the 3 rear propeller shaft bolts (1). Fastener Specifications
  45. GM5863694Courtesy of GENERAL MOTORS COMPANY

    Align the reference mark (2) between the propeller shaft flange (3) and the output flange (1) of the transmission.

  46. GM5863696Courtesy of GENERAL MOTORS COMPANY

    If NEW threaded components are being installed, loosen the adhesive using a metal pick or similar tool before proceeding. If threaded components are reused, prepare the threaded components using the following steps:

    1. Remove any loose cured adhesive from the external threads of the components using a lint free cloth.
    2. Thread the cleaned components into the internal mating threads and remove to loosen trapped cured adhesive.
    3. Apply thread locking adhesive to the external threads of the components. Adhesives, Fluids, Lubricants, and Sealers
    4. Apply liquid thread locking adhesive in a strip along half of the length of the external threads, starting at the tip, just prior to installation.
  47. Install the 3 front propeller shaft nuts (1) and the 3 front propeller shaft bolts (2).
  48. Tighten the 3 front propeller shaft bolts (2). Fastener Specifications
  49. GM5867371Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount (2) - Install

  50. NOTE:

    For proper bolt alignment, loosely install all mount bolts prior to tightening to specifications.

  51. Transmission Mount Bolt (1) - Loosely install [2x]
  52. GM5867370Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bracket Bolt (1) - Loosely install [4x]

  53. GM5867371Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bolt (1) - Tighten [2x] - Fastener Specifications

  54. GM5867370Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Bracket Bolt (1) - Tighten [4x] - Fastener Specifications

  55. Remove the jack stand.
  56. GM5334717Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Number 2 Cross Bar Reinforcement (2) - Install

  57. Floor Panel Number 2 Cross Bar Reinforcement Bolt (1) - Install and tighten [4x] - Fastener Specifications
  58. GM5865888Courtesy of GENERAL MOTORS COMPANY

    Exhaust Intermediate Underbody Heat Shield (2) - Install

  59. Exhaust Heat Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications
  60. GM5865329Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Gasket (2) - Install NEW

  61. With the aid of an assistant, install the exhaust muffler (1).
  62. GM5865300Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler Hanger Bracket Nut (1) - Install and tighten [4x] - Fastener Specifications

  63. GM5865293Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  64. GM5865287Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  65. GM5406632Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Right Side (2) - Install [2x]

  66. GM5406578Courtesy of GENERAL MOTORS COMPANY

    Exhaust Muffler (1) @ Exhaust Intermediate Pipe Insulator-Left Side (2) - Install [2x]

  67. GM5865271Courtesy of GENERAL MOTORS COMPANY

    Exhaust Pipe Clamp (1) - Tighten [2x] - Fastener Specifications

  68. GM5865265Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Nut (1) - Install and tighten [2x] - Fastener Specifications

  69. GM5400756Courtesy of GENERAL MOTORS COMPANY

    Floor Panel Reinforcement (2) - Install

  70. Floor Panel Number 4 Cross Bar Reinforcement Bolt (1) - Install and tighten [6x] - Fastener Specifications
  71. GM5854893Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Left Side (5) - Install

  72. Transmission Fluid Cooler Pipe Bracket Bolt- Left Side (3) - Install and tighten [2x] - Fastener Specifications
  73. Underbody Rear Air Deflector Nut- Left Side (2) - Install and tighten [5x] - Fastener Specifications
  74. Underbody Front Air Deflector Bolt- Left Side (1) - Install and tighten [6x] - Fastener Specifications
  75. GM5839256Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Right Side (5) - Install

  76. Transmission Fluid Cooler Pipe Bracket Bolt- Right Side (3) - Install and tighten [2x] - Fastener Specifications
  77. Underbody Rear Air Deflector Nut- Right Side (2) - Install and tighten [5x] - Fastener Specifications
  78. Underbody Front Air Deflector Bolt- Right Side (1) - Install and tighten [6x] - Fastener Specifications
  79. GM5400642Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Right Side (5) - Install

  80. Underbody Rear Air Deflector Nut- Right Side (3) - Install and tighten [3x] - Fastener Specifications
  81. Underbody Rear Air Deflector Bolt- Right Side (2) - Install and tighten [3x] - Fastener Specifications
  82. Underbody Rear Air Deflector Nut- Right Side (4) - Install and tighten [2x] - Fastener Specifications
  83. Rear Wheelhouse Liner Bolt- Right Side (1) - Install and tighten - Fastener Specifications
  84. GM5400553Courtesy of GENERAL MOTORS COMPANY

    Underbody Rear Air Deflector- Left Side (5) - Install

  85. Underbody Rear Air Deflector Nut- Left Side (2) - Install and tighten [3x] - Fastener Specifications
  86. Underbody Rear Air Deflector Bolt- Left Side (3) - Install and tighten [3x] - Fastener Specifications
  87. Underbody Rear Air Deflector Nut- Left Side (4) - Install and tighten [2x] - Fastener Specifications
  88. Rear Wheelhouse Liner Bolt- Left Side (1) - Install and tighten - Fastener Specifications
  89. GM5395705Courtesy of GENERAL MOTORS COMPANY

    Rear Tire Front Air Deflector- Left Side and Right Side (2) - Install [2x]

  90. Rear Tire Front Air Deflector Bolt- Left Side and Right Side (1) - Install and tighten [4x] - Fastener Specifications
  91. Lower the vehicle.
  92. Refill the fuel tank.
  93. Check the transmission fluid level. Transmission Fluid Level and Condition Check
  94. Inspect for transmission fluid leaks. Fluid Leak Diagnosis
  95. Pressurize the fuel system and inspect for leaks.
  96. Inspect the exhaust system for leaks.