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Home >> Chevrolet >> 2022 >> Tahoe PPV, RWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MQC) - Repair Instructions - On Vehicle (1 Of 2) >> Repair Instructions - On Vehicle >> Transmission Replacement (LM2, 4WD and NP0 without F47) >> Installation Procedure

Installation Procedure

  1. Note the new transmission unique number (TUN).
  2. Support the transmission with a suitable transmission jack.
  3. GM5647019Courtesy of GENERAL MOTORS COMPANY

    Raise the transmission (1) into place.

  4. GM5608009Courtesy of GENERAL MOTORS COMPANY

    Remove the DT-21366  Converter Holding Strap (1).

  5. GM5647019Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The torque converter must rotate freely by hand.

    Slide the transmission (1) straight onto the locating pins.

  6. GM5136473Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Install and tighten the transmission stud (1) and the transmission bolt (2). Fastener Specifications

  7. GM5136887Courtesy of GENERAL MOTORS COMPANY

    Transmission Stud (1) - Install and tighten [2x] - Fastener Specifications

  8. GM5136415Courtesy of GENERAL MOTORS COMPANY

    Transmission Stud (1) - Install and tighten [4x] - Fastener Specifications

  9. GM5739769Courtesy of GENERAL MOTORS COMPANY

    Transmission Bolt (1) - Install and tighten - Fastener Specifications

  10. GM5644353Courtesy of GENERAL MOTORS COMPANY

    Install the fuel lines with the fuel cooler (3) as necessary.

  11. Fuel Feed and Return Front Hose Bracket Nut (1) - Install and tighten - Fastener Specifications
  12. GM5617142Courtesy of GENERAL MOTORS COMPANY

    Fuel Cooler Bolt (2) - Install and tighten [2x] - Fastener Specifications

  13. Fuel Cooler Support Bracket Bolt (1) - Install and tighten [2x] - Fastener Specifications
  14. GM5617621Courtesy of GENERAL MOTORS COMPANY

    Retainer (2) - Install

  15. GM5135431Courtesy of GENERAL MOTORS COMPANY

    Install the transmission vent tube (2).

  16. Install the 2 transmission vent hose retainers (1).
  17. GM5739206Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Channel (1) - Install

  18. GM5646918Courtesy of GENERAL MOTORS COMPANY

    Connect the transmission wiring harness connector (1).

  19. Position the wiring harness then install the 2 wiring harness retainers (2).
  20. GM5606810Courtesy of GENERAL MOTORS COMPANY

    Transfer Case Adapter Gasket (3) - Install NEW

  21. Transfer Case (2) - Install
  22. Transfer Case Nut (1) - Install and tighten [6x] - Fastener Specifications
  23. Connect the wiring harness retainers.
  24. Remove the transmission jack from the transfer case.
  25. GM5606248Courtesy of GENERAL MOTORS COMPANY

    Transfer Case Vent Hose (1) - Install

  26. GM5605434Courtesy of GENERAL MOTORS COMPANY

    Reposition the wiring harness and install the wiring harness retainer (3) in to the transfer case.

  27. Connect the transfer case two/four wheel drive actuator position sensor electrical connector (2).
  28. Connect the transfer case two/four wheel drive actuator electrical connector (1).
  29. GM4960510Courtesy of GENERAL MOTORS COMPANY

    Transmission Heat Shield (3) - Install

  30. 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  31. Transmission Heat Shield Bolt (2) - Install and tighten - Fastener Specifications
  32. Transmission Heat Shield Bolt (1) - Install and tighten [2x] - Fastener Specifications
  33. Connect the wiring harness retainers.
  34. GM5185017Courtesy of GENERAL MOTORS COMPANY

    Exhaust Front Bracket (2) - Install

  35. Catalytic Converter Brace Bracket Bolt (1) - Install and tighten [2x] - Fastener Specifications
  36. Connect the wiring harness retainers.
  37. GM5590452Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount (2) - Install

  38. 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  39. Transmission Mount Bolt (1) - Install and tighten [2x] - Fastener Specifications
  40. GM4971889Courtesy of GENERAL MOTORS COMPANY

    Raise the transmission into place.

  41. Transmission Support Crossmember (1) - Install
  42. GM4971885Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember Bolt (2) - Install [4x]

  43. Transmission Support Crossmember Nut (1) - Install and tighten [4x] - Fastener Specifications
  44. GM4971868Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Nut (1) - Install and tighten [2x] - Fastener Specifications

  45. Remove the transmission jack.
  46. GM5674935Courtesy of GENERAL MOTORS COMPANY

    Install the wiring harness as necessary and connect the 4 wiring harness retainers (3).

  47. GM5675037Courtesy of GENERAL MOTORS COMPANY

    Using the EN-52579  Crankshaft Rotator (1), rotate the crankshaft balancer bolt clockwise ONLY, to align the transmission torque converter bolts with the starter opening.

  48. GM5137326Courtesy 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  49. NOTE:

    For proper alignment of all transmission torque converter bolts, install the first torque converted bolt in the oval shaped hole.

  50. Using the EN-52579  Crankshaft Rotator, rotate the crankshaft balancer bolt clockwise ONLY, to align the transmission torque converter bolts with the starter opening.
  51. Transmission Torque Converter Bolt (1) - Install and tighten [6x] - Fastener Specifications
  52. GM5675037Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-52579  Crankshaft Rotator (1).

  53. GM5877076Courtesy of GENERAL MOTORS COMPANY

    Install the engine front cover (1) from the bottom of the vehicle.

  54. GM5512311Courtesy of GENERAL MOTORS COMPANY

    {with RC1} Underbody Splash Shield (1) - Install

    1. GM5512320Courtesy of GENERAL MOTORS COMPANY

      Underbody Splash Shield Bolt (1) - Install and tighten [4x] - Fastener Specifications

    2. Underbody Splash Shield Bolt (2) - Install and tighten [4x] - Fastener Specifications
  55. GM5591893Courtesy of GENERAL MOTORS COMPANY

    {with WTX} Front Bumper Fascia Extension (4) - Install

    1. Install wiring harness retainers as needed.
    2. Front Bumper Fascia Extension Bolt (3) @ Underbody Skid Shield - Install and tighten [2x] - Fastener Specifications
    3. Front Bumper Fascia Extension Bolt (2) - Install and tighten [4x] - Fastener Specifications
    4. GM5540946Courtesy of GENERAL MOTORS COMPANY

      Front Bumper Fascia Extension (1) - Install

    5. GM5540945Courtesy of GENERAL MOTORS COMPANY

      Front Bumper Fascia Extension Bolt (2) - Install and tighten [8x] - Fastener Specifications

    6. Front Bumper Fascia Air Deflector Bolt (1) - Install and tighten [10x] - Fastener Specifications
  56. GM5160907Courtesy of GENERAL MOTORS COMPANY

    {If equipped} Retainer Clip (1) - Engage

  57. GM5627087Courtesy of GENERAL MOTORS COMPANY

    Uncap the fittings and unplug the holes of the transmission.

  58. Transmission Fluid Cooler Pipe Seal (2) - Install NEW [2x]
  59. Transmission Fluid Cooler Inlet and Outlet Pipe (1) - Install
  60. GM5617646Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Nut (1) - Install and tighten - Fastener Specifications

  61. GM5157649Courtesy of GENERAL MOTORS COMPANY

    Reposition the fuel heater inlet and outlet bracket.

  62. Fuel Heater Inlet and Outlet Bolt (1) @ Transmission - Install and tighten - Fastener Specifications
  63. GM5157640Courtesy of GENERAL MOTORS COMPANY

    Reposition the fuel heater inlet and outlet bracket.

  64. Fuel Heater Inlet and Outlet Nut (1) @ Transmission - Install and tighten - Fastener Specifications
  65. GM5644313Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Seal (5) - Install NEW

  66. Remove the suitable strap or wire then reposition the transmission fluid cooling exchanger with automatic transmission fluid cooler inlet and outlet pipes (4) onto the transmission as necessary.
  67. Automatic Transmission Fluid Cooling Exchanger Nut (3) - Install and tighten - Fastener Specifications
  68. Transmission Fluid Cooler Pipe Bolt (2) - Install and tighten - Fastener Specifications
  69. Automatic Transmission Fluid Cooling Exchanger Bolt (1) - Install and tighten [2x] - Fastener Specifications
  70. GM5591284Courtesy of GENERAL MOTORS COMPANY

    Propeller Shaft (1) - Install

  71. GM5591283Courtesy of GENERAL MOTORS COMPANY

    Align the reference marks made between the differential drive pinion gear yoke and the propeller shaft.

  72. 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  73. Install the 4 rear propeller shaft bolts (1) and tighten in a crisscross pattern. Fastener Specifications
  74. GM5590596Courtesy of GENERAL MOTORS COMPANY

    Apply a thin layer of grease to the splines of the transfer case front output shaft (1). Adhesives, Fluids, Lubricants, and Sealers

  75. Loosely install a NEW transfer case front output shaft boot clamp (2) to the transfer case front output shaft boot groove.
  76. Align the reference marks made between the transfer case front output shaft and the front axle propeller shaft.
  77. Front Axle Propeller Shaft (3) - Install
  78. GM5629570Courtesy 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  79. Align the reference marks made between the front axle propeller shaft (1) and the front differential drive pinion gear yoke.
  80. Front Axle Propeller Shaft Washer (3) - Install [3x]
  81. Install the 6 front axle propeller shaft bolts (2) and tighten in a crisscross pattern. Fastener Specifications
  82. GM5044025Courtesy of GENERAL MOTORS COMPANY

    Ensure the transfer case front output shaft boot (1) is fully engaged into the groove of the transfer case front output shaft.

  83. Using the DT-35910  Drive Axle Seal Clamp Pliers (2), crimp the transfer case front output shaft boot clamp (3) until the gap (a) at the base of the ear is 1.5 mm (0.059 in).
  84. Partially lower the vehicle.
  85. GM5387083Courtesy of GENERAL MOTORS COMPANY

    Install the starter (1) through the wheel well.

  86. GM5153063Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Connect

  87. GM5609862Courtesy of GENERAL MOTORS COMPANY

    Starter Bolt (1) - Install and tighten [3x] - Fastener Specifications

  88. GM5152987Courtesy of GENERAL MOTORS COMPANY

    Starter Solenoid Cable (3) - Install

  89. Starter Solenoid Cable Nut (1) - Install and tighten - Fastener Specifications
  90. Wiring Harness Conduit Nut (2) - Install and tighten - Fastener Specifications
  91. GM5608813Courtesy of GENERAL MOTORS COMPANY

    Starter Heat Shield (1) - Install

  92. GM5674667Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Components removed for graphic clarity.

    Engage the starter heat shield (2) into the retainer (1).

  93. Starter Heat Shield Bolt (3) - Install and tighten [2x] - Fastener Specifications
  94. GM5479727Courtesy of GENERAL MOTORS COMPANY

    Chassis Wiring Harness (4) - Install

  95. Install the positive battery cable retainers to the chassis wiring harness front bracket.
  96. Chassis Front Wiring Harness Bracket Bolt - Front (3) - Install and tighten - Fastener Specifications
  97. Chassis Front Wiring Harness Bracket Bolt - Rear (1) - Install and tighten - Fastener Specifications
  98. Chassis Wiring Harness Front Bracket Retainer (2) - Install [2x]
  99. GM5184846Courtesy of GENERAL MOTORS COMPANY

    Exhaust System Front Gasket (2) - Install NEW

  100. Nitrogen Oxides Catalytic Converter (1) - Install
  101. GM5341378Courtesy of GENERAL MOTORS COMPANY

    Exhaust Front Pipe Nut (1) - Install and tighten [2x] - Fastener Specifications

  102. GM5634664Courtesy of GENERAL MOTORS COMPANY

    Catalytic Converter Brace Bracket (3) - Install

  103. Wiring Harness Retainer (2) @ Catalytic Converter Brace Bracket (3) - Install
  104. Catalytic Converter Brace Bracket Nut (1) - Install and tighten [2x] - Fastener Specifications
  105. GM5340362Courtesy of GENERAL MOTORS COMPANY

    Exhaust Front Pipe Nut (1) @ Catalytic Converter Brace Bracket - Install and tighten [2x] - Fastener Specifications

  106. GM5341429Courtesy of GENERAL MOTORS COMPANY

    Exhaust Pipe Clamp (1) - Tighten - Fastener Specifications

  107. GM5151789Courtesy of GENERAL MOTORS COMPANY

    Coat the threads of the exhaust particulate matter sensor (1) with anti-seize compound. Adhesives, Fluids, Lubricants, and Sealers

  108. Using a suitable tool, install and tighten the exhaust particulate matter sensor (1). Fastener Specifications
  109. GM5150652Courtesy of GENERAL MOTORS COMPANY

    Coat the threads of the position 3 nitrogen oxides sensor (1) with anti-seize compound. Adhesives, Fluids, Lubricants, and Sealers

  110. Using a suitable tool, install and tighten the position 3 nitrogen oxides sensor (1). Fastener Specifications
  111. GM5149436Courtesy of GENERAL MOTORS COMPANY

    Coat the threads of the position 2 nitrogen oxides sensor (1) with anti-seize compound. Adhesives, Fluids, Lubricants, and Sealers

  112. Using a suitable tool, install and tighten the position 2 nitrogen oxides sensor (1). Fastener Specifications
  113. GM5153130Courtesy of GENERAL MOTORS COMPANY

    Using a suitable tool, install and tighten the position 3 exhaust gas temperature sensor (1). Fastener Specifications

  114. GM4968633Courtesy of GENERAL MOTORS COMPANY

    {If equipped} Transfer Case Skid Shield (2) - Install

  115. {If equipped} Transfer Case Skid Shield Bolt (1) - Install and tighten [3x] - Fastener Specifications
  116. Partially lower the vehicle.
  117. Front Wheelhouse Liner - Right Side - Install - Front Wheelhouse Liner Replacement
  118. GM5619156Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Push down and rearward on the engine front cover (2) to engage the 5 retaining grommets to the ball studs.

  119. Engine Front Cover (2) - Install
  120. GM5572432Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Front End Sheet Metal Diagonal Brace - Left Side and Right Side (2) - Install [2x]

  121. 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. Ensure there are no gaps in the thread locking adhesive once applied to the component.
  122. Front End Sheet Metal Diagonal Brace Bolt - Left Side and Right Side (1) - Install and tighten [4x] - Fastener Specifications
  123. GM5617832Courtesy of GENERAL MOTORS COMPANY

    Intake Air Splash Shield (2) - Install

  124. Intake Air Baffle Retainer (1) - Install [9x]
  125. GM5541781Courtesy of GENERAL MOTORS COMPANY

    Hood Secondary Latch Release Handle (2) - Install

  126. Hood Latch Actuator Bolt (1) - Install and tighten [2x] - Fastener Specifications
  127. Oil Filler Cap - Remove
  128. GM5171779Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Cover (2) - Install

  129. Intake Manifold Cover Bolt (1) - Install and tighten - Fastener Specifications
  130. Oil Filler Cap - Install
  131. Connect the battery negative cable. Battery Negative Cable Disconnection and Connection (9C1, 5W4) , or Battery Negative Cable Disconnection and Connection (KL9)
  132. Fill the transmission to the proper level with NEW transmission fluid. Transmission Fluid Fill Procedure
  133. Inspect for Leaks
  134. Perform the solenoid valve characterization. Q77 Transmission Control Solenoid Valve Characterization Programming
  135. NOTE:

    The Service Fast Learn procedure must be performed when one of the following repairs have been made to the vehicle. Failure to perform the procedure after one of the following repairs may result in poor transmission performance, as well as transmission DTCs being set:

    The service fast learn procedure must be performed when any of the following repairs has been made to the transmission.

    • Pressure regulating solenoid replacement
    • Valve body repair or replacement
    • Any service/repair in response to a shift quality concern
    • Any internal transmission service, repair, overhaul, or replacement
    • Torque converter replacement
    • TCM replacement
    • Transmission assembly replacement
  136. Perform the transmission service fast learn procedure. Transmission Service Fast Learn Procedure