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Home >> GMC >> 2021 >> Yukon XL AT4 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions ( 1 Of 12) >> Repair Instructions >> Engine Removal and Installation (L84, 2WD, with RC1, without F47) >> Removal Procedure

Removal Procedure

  1. Recover the refrigerant. Refrigerant Recovery and Recharging
  2. Relieve the fuel system pressure. Fuel Pressure Relief
  3. Disconnect the battery negative cable. Battery Negative Cable Disconnection and Connection (KL9)
  4. Front Wheelhouse Liner- Left Side and Right Side - Remove [ 2x ] - Front Wheelhouse Liner Replacement
  5. GM5541781Courtesy of GENERAL MOTORS COMPANY

    Hood Latch Actuator Bolt (1) - Remove [ 2x ]

  6. Hood Secondary Latch Release Handle (2) - Remove
  7. GM5541784Courtesy of GENERAL MOTORS COMPANY

    Intake Air Baffle Retainer (1) - Remove [ 9x ]

  8. Intake Air Splash Shield (2) - Remove
  9. GM5537668Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Remove the left and right side front bumper fascia bolt (1).

  10. GM5537669Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Loosen the 2 left and right side front bumper fascia guide bolts (1).

  11. Remove the left and right side front bumper fascia bolt (2).
  12. GM5537670Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Fascia Skid Plate Bolt (1) - Remove [ 4x ]

  13. GM5589687Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

    Remove the left and right side front bumper fascia support brace bolts (1).

  14. GM5589690Courtesy of GENERAL MOTORS COMPANY

    Front Grille Bolt (1) - Remove [ 6x ]

  15. GM5589689Courtesy of GENERAL MOTORS COMPANY

    Apply a double layer of masking tape to the left and right headlamp to prevent damaging / scratching the headlamp lens.

  16. On the left and right side of the front bumper fascia (1) carefully push a small nylon wedge between the front bumper fascia and the front bumper fascia guide. Insert a suitable flat-bladed plastic trim tool, into the fascia slot and depress the snaps one at a time and pull on the fascia at the same time to gradually remove front bumper fascia
  17. Starting at the inside of the headlamp, release the front bumper fascia (1) from the headlamps.
  18. GM5589691Courtesy of GENERAL MOTORS COMPANY

    { If equipped } Disconnect the electrical connectors.

  19. Release the 7 grille clips (1).
  20. With the aid of an assistant, remove the fascia. (2)
  21. GM5513633Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The proper position of the underbody skid shield is between the front bumper fascia extension and the front frame.

    Underbody Skid Shield Bolt (1) - Remove [ 4x ]

  22. Underbody Skid Shield (2) - Remove
  23. Drain the coolant

    Cooling System Draining and Filling (GE 47716 L84, L87) , or

    Cooling System Draining and Filling (Static L84, L87) .

  24. Drain the engine oil. Engine Oil and Oil Filter Replacement
  25. GM5527817Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Refer to Safety Glasses Warning .

    CAUTION:

    Always turn the ignition off when installing or removing the ECM connectors in order to prevent damage to the components.

    CAUTION:
    • Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage.
    • Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.
    • In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board.
    • Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module.
    • The replacement control module must be programmed.

    Disconnect the electrical connectors. (1)

  26. GM5535962Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Parts removed from graphic for clarity.

    Disconnect the electrical connector. (1)

  27. GM5022643Courtesy of GENERAL MOTORS COMPANY

    { If equipped } Engine Coolant Heater Cord (1) @ Engine Coolant Heater - Disconnect

  28. GM5001375Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct Bracket Bolt (1) - Remove

  29. Engine Wiring Harness @ Air Cleaner Outlet Duct Bracket - Remove
  30. GM5551440Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Outlet Duct Clamp (2) - Loosen [ 2x ]

  31. Positive Crankcase Ventilation Fresh Air Tube (1) - Disconnect - Plastic Collar Quick Connect Fitting Service
  32. Air Cleaner Outlet Duct (3) - Remove
  33. GM5605350Courtesy of GENERAL MOTORS COMPANY

    Headlamp Bolt (1) - Remove [ 6x ]

  34. GM5605352Courtesy of GENERAL MOTORS COMPANY

    Headlamp Bolt (1) - Remove [ 6x ]

  35. GM5605353Courtesy of GENERAL MOTORS COMPANY

    Release the front headlamp guide pin from the front bumper fascia guide (1).

  36. Front Headlamp (2) - Remove [ 2x ]
  37. Release the wiring harness retaining tab.
  38. Disconnect all electrical connectors.
  39. GM5544167Courtesy of GENERAL MOTORS COMPANY

    Loosen the left and right side front bumper fascia upper stiffener nut (1).

  40. Remove the left and right side front bumper fascia upper stiffener bolt (2).
  41. GM5544169Courtesy of GENERAL MOTORS COMPANY

    Pull the front bumper fascia upper stiffener (1) up and out over the stud.

  42. GM5548894Courtesy of GENERAL MOTORS COMPANY

    Front Bumper Shutter Bolt (1) - Remove [ 9x ]

  43. Disconnect the electrical connector and reposition wiring harness.
  44. Front Bumper Shutter (2) - Remove
  45. GM5020580Courtesy of GENERAL MOTORS COMPANY

    Intake Air Duct Retainer (1) - Remove

  46. Intake Air Duct (2) - Remove
  47. GM5587671Courtesy of GENERAL MOTORS COMPANY

    Disconnect the mass airflow sensor electrical connector (1) and remove all engine wiring harnesses from the air cleaner assembly.

  48. GM5020719Courtesy of GENERAL MOTORS COMPANY

    Air Cleaner Nut (1) - Remove

  49. Air Cleaner Assembly (2) - Remove
  50. GM5571687Courtesy of GENERAL MOTORS COMPANY

    Plenum Front Panel Outer Reinforcement (1) - Remove - Plenum Front Panel Outer Reinforcement Removal and Installation

  51. GM5010400Courtesy of GENERAL MOTORS COMPANY

    Radiator Air Side Baffle Retainer (1) - Remove [ 4x ]

  52. Radiator Air Side Baffle - Remove
  53. GM5569434Courtesy of GENERAL MOTORS COMPANY

    Radiator Air Side Baffle Retainer (2) - Remove

  54. Radiator Air Side Baffle - Left Side (1) - Remove
  55. GM5568597Courtesy of GENERAL MOTORS COMPANY

    Front End Sheet Metal Diagonal Brace Bolt (1) @ Upper Tie Bar - Remove [ 4x ]

  56. Front End Sheet Metal Diagonal Brace (2) @ Upper Tie Bar - Remove [ 2x ]
  57. GM5568592Courtesy of GENERAL MOTORS COMPANY

    Release the 6 integral retaining features (1).

  58. Radiator Air Upper Baffle (2) - Remove
  59. GM5572426Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Right side shown, left side similar.

    Front End Sheet Metal Diagonal Brace Bolt- Left Side and Right Side (1) - Remove [ 4x ]

  60. Front End Sheet Metal Diagonal Brace- Left Side and Right Side (2) @ Radiator Support - Remove [ 2x ]
  61. GM5573123Courtesy of GENERAL MOTORS COMPANY

    Reposition the hood primary latch release cable (1) from the upper tie bar retainer (2).

  62. Hood Primary Latch Release Cable (1) - Disconnect @ Hood Primary Latch
  63. Disconnect the electrical connector.
  64. GM5582568Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (2) - Disconnect

  65. GM5552336Courtesy of GENERAL MOTORS COMPANY

    Front Grille Support Bracket Bolt (1) - Remove [ 4x ]

  66. Front Grille Support Reinforcement (2) - Remove
  67. GM5605759Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar Bolt- Left Side (1) - Remove [ 3x ]

  68. GM5605761Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar Bolt- Right Side (1) - Remove [ 3x ]

  69. GM5605760Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar Bolt (1) @ Headlamp Bracket - Remove [ 2x ]

  70. Front End Upper Tie Bar Bolt (2) - Remove
  71. GM5605762Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar Bolt- Right Side (1) - Remove

  72. GM5666045Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar Bolt (1) @ Headlamp Bracket - Remove [ 8x ]

  73. Headlamp Bracket (2) - Remove [ 2x ]
  74. GM5605789Courtesy of GENERAL MOTORS COMPANY

    Front End Upper Tie Bar (1) - Remove

  75. Disconnect the wiring harness from the front end upper tie bar.
  76. GM5568590Courtesy of GENERAL MOTORS COMPANY

    Radiator Surge Tank Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  77. Radiator Surge Tank Inlet Hose (2) @ Engine Radiator - Remove and position aside
  78. GM5572790Courtesy of GENERAL MOTORS COMPANY

    Retaining Tab (1) - Disengage [ 2x ]

  79. Engine Wiring Harness Junction Block Cover (2) - Remove
  80. Battery Positive Cable Nut (3) - Remove
  81. Starter Solenoid Cable (4) - Remove
  82. GM5572883Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Junction Block Bolt (2) - Loosen [ 4x ]

  83. Retaining Tab (1) - Disengage [ 4x ]
  84. Engine Wiring Harness Junction Block (3) - Remove
  85. GM5573073Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) - Remove [ 4x ]

  86. GM5573198Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Fuse Block Bracket Bolt (2) - Remove [ 2x ]

  87. Retaining Tab (1) - Disengage
  88. Engine Wiring Harness Fuse Block Bracket (3) - Remove
  89. GM5568620Courtesy of GENERAL MOTORS COMPANY

    Heater Outlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  90. Radiator Surge Tank Outlet Hose Clip (2) - Remove [ 2x ]
  91. Radiator Surge Tank Outlet Hose (3) @ Heater Outlet Hose - Remove and position aside
  92. GM5568866Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Radiator Inlet Hose Clip (2) - Remove

  93. Radiator Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  94. Radiator Inlet Hose (3) @ Engine Radiator - Remove and position aside
  95. GM5568870Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Wiring Harness Retainer (1) - Remove [ 2x ]

  96. Electrical Connector (3) - Disconnect
  97. Wiring Harness (2) - Position aside
  98. GM5568871Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Wiring Harness Retainer (2) - Remove [ 2x ]

  99. Electrical Connector (1) - Disconnect
  100. Wiring Harness (3) - Position aside
  101. GM5568876Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Retainer (2) - Remove [ 2x ]

  102. Engine Oil Cooler Pipe Bracket Bolt (3) - Remove
  103. Engine Oil Cooler Hose (1) @ Engine Radiator - Remove [ 2x ]
  104. GM5569435Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Auxiliary Cooler Pipe Bolt (1) - Remove

  105. Transmission Fluid Cooler Pipe Clip (2) - Remove [ 2x ]
  106. GM5569446Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Nut (1) - Remove

  107. Transmission Fluid Cooler Inlet and Outlet Pipe (2) @ Transmission Fluid Auxiliary Cooler - Remove and position aside
  108. Transmission Fluid Cooler Pipe Fitting Seal (3) - Remove and DISCARD
  109. GM5569448Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Nut (1) - Remove

  110. GM5569449Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Inlet and Outlet Pipe (1) @ Transmission Fluid Auxiliary Cooler - Remove and position aside

  111. Transmission Fluid Cooler Pipe Fitting Seal (2) - Remove and DISCARD
  112. GM5569584Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Clip (1) - Release

  113. GM5569587Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor and Condenser Hose Nut (1) - Remove

  114. Air Conditioning Compressor and Evaporator Hose Nut (2) - Remove
  115. GM5569588Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor and Condenser Hose (1) @ Air Conditioning Condenser - Remove

  116. Air Conditioning Condenser and Evaporator Hose (3) @ Air Conditioning Condenser - Remove
  117. Air Conditioning Compressor and Condenser Hose Seal (2) - Remove and DISCARD [ 2x ]
  118. GM5569581Courtesy of GENERAL MOTORS COMPANY

    Radiator Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  119. Radiator Outlet Hose (2) @ Engine Radiator - Remove
  120. GM5569590Courtesy of GENERAL MOTORS COMPANY

    Rotate the top of the condenser, fan and radiator assembly (1) rearward and lift it out of the engine compartment.

  121. GM4997349Courtesy of GENERAL MOTORS COMPANY

    Heater Inlet Hose (3) @ Heater Inlet and Outlet Hose Clip (1) - Remove

  122. GM5581805Courtesy of GENERAL MOTORS COMPANY

    Heater Outlet Hose (3) @ Heater Inlet and Outlet Hose Clip (1) - Remove

  123. Heater Outlet Hose Clamp (4) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  124. Heater Outlet Hose (3) @ Radiator Surge Tank Outlet Hose - Remove
  125. Heater Outlet Hose Clip (2) @ Heater Water Auxiliary Pump Hose - Remove
  126. GM5606792Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The accessory drive primary belt is not reusable.

    Some components not shown for graphic clarity.

    Using a suitable tool, cut the accessory drive primary belt (1).

  127. Accessory Drive Primary Belt (1) - Remove and DISCARD
  128. GM5606811Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The accessory drive auxiliary belt is not reusable.

    Using a suitable tool, cut the accessory drive auxiliary belt (1).

  129. Accessory Drive Auxiliary Belt (1) - Remove and DISCARD
  130. GM5573641Courtesy of GENERAL MOTORS COMPANY

    Battery Positive Cable Nut (1) - Remove

  131. Starter Solenoid Cable (2) - Remove
  132. Electrical Connector (3) - Disconnect
  133. GM5642527Courtesy of GENERAL MOTORS COMPANY

    Generator Bolt (1) - Remove [ 2x ]

  134. GM5642615Courtesy of GENERAL MOTORS COMPANY

    Generator (1) - Remove

  135. GM4994147Courtesy of GENERAL MOTORS COMPANY

    Hose Clamp (1) - Disengage [ 2x ] - Hose Clamp Replacement Guidelines - Spring Type

  136. Heater Inlet Hose (2) @ Water Pump - Remove
  137. Heater Water Auxiliary Pump Hose (3) @ Water Pump - Remove
  138. GM4994158Courtesy of GENERAL MOTORS COMPANY

    Radiator Outlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type

  139. Radiator Outlet Hose (2) @ Water Pump - Remove
  140. GM4994407Courtesy of GENERAL MOTORS COMPANY

    Hose Clamp (1) - Disengage [ 2x ] - Hose Clamp Replacement Guidelines - Spring Type

  141. Engine Coolant Air Bleed Hose (2) @ Water Pump - Remove
  142. Radiator Inlet Hose (3) @ Water Pump - Remove
  143. GM4994461Courtesy of GENERAL MOTORS COMPANY

    Engine Coolant Temperature Sensor Electrical Connector (1) - Disconnect

  144. GM5619709Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Air Conditioning Compressor - Disconnect

  145. GM5585694Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor Bolt (1) - Remove

  146. Air Conditioning Compressor Nut (2) - Remove
  147. Air Conditioning Compressor Stud (3) - Remove
  148. GM5585692Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor (1) - Position aside

  149. GM4994474Courtesy of GENERAL MOTORS COMPANY

    Water Pump Housing Bolt (1) - Remove [ 6x ]

  150. GM5587617Courtesy of GENERAL MOTORS COMPANY

    Water Pump (1) - Remove

  151. Water Pump Gasket (2) - Remove and DISCARD [ 2x ]
  152. GM5538400Courtesy of GENERAL MOTORS COMPANY

    Evaporative Emission Canister Purge Tube Connector (1) @ Evaporative Emission Canister Purge Solenoid Valve - Disengage - Plastic Collar Quick Connect Fitting Service

  153. Evaporative Emission Canister Purge Tube (2) @ Evaporative Emission Canister Purge Solenoid Valve - Remove and position aside
  154. GM5540971Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Connector (1) @ Throttle Body - Disconnect

  155. Engine Wiring Harness Retainer (2) @ Intake Manifold Cover - Remove [ 2x ]
  156. Engine Wiring Harness Connector (3) @ Manifold Absolute Pressure Sensor - Disconnect
  157. Engine Wiring Harness Connector (4) @ Evaporative Emission Canister Purge Solenoid Valve - Disconnect
  158. GM5540973Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Remove [ 4x ]

  159. GM5540974Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Remove [ 3x ]

  160. GM5527888Courtesy of GENERAL MOTORS COMPANY

    Positive Crankcase Ventilation Tube Connector (2) @ Intake Manifold - Disconnect and reposition - Plastic Collar Quick Connect Fitting Service

  161. GM5540977Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Loosen the 10 intake manifold bolts (1) until the bolts are no longer threaded into the cylinder heads.

  162. Move the intake manifold and intake manifold cover (2) forward enough to gain access to the rear engine wiring harness retainers.
  163. GM5540975Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (1) @ Intake Manifold Cover (2) - Remove [ 4x ]

  164. GM5540978Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The aid of an assistant may be helpful in holding the engine harness up out of the way so the upper intake manifold cover does not get caught against the engine harness.

    Remove the intake manifold and intake manifold cover (1) as an assembly.

  165. Cover the cylinder head passages in order to prevent dirt or debris from entering the passages.
  166. GM5541471Courtesy of GENERAL MOTORS COMPANY

    Intake Manifold Gasket (1) - Remove and DISCARD [ 8x ]

  167. GM5557530Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    The noise cancelling foam component MUST be replaced if it has been exposed to engine fluids. Failure to replace the noise cancelling foam component that has been exposed to engine fluids may result in an engine fire resulting in catastrophic engine damage, and possible injury or death.

    Fuel Pump Insulator (1) - Remove

  168. GM5569054Courtesy of GENERAL MOTORS COMPANY

    Fuel Feed Pipe (1) - Disconnect - Metal Collar Quick Connect Fitting Service

  169. Fuel Feed Pipe (1) - Reposition
  170. GM5046938Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    To tighten or loosen the fuel injection fuel rail fuel pressure sensor, apply force ONLY to the attached hexagon. Applying force to the plastic housing of the sensor may damage the sensor.

    Electrical Connector (1) @ Fuel Rail Pressure Sensor (2) - Disconnect

  171. NOTE:

    Some fuel may leak from the fuel rail pressure sensor orifice after the sensor is removed. Dry the area around this orifice after the removal of the sensor using a lint free cloth and inspect the fuel rail pressure sensor sealing surface. The surface should be free of fuel, debris, and burrs.

  172. Fuel Rail Pressure Sensor (2) @ Fuel Injection Fuel Rail (3) - Remove
  173. GM5053741Courtesy of GENERAL MOTORS COMPANY

    Install the EN-36857  Engine Lift Bracket (1) using the EN-52059  Engine Support Fixture Adapter Bolt - M10 (2) to the cylinder head and hand tighten.

  174. GM5053735Courtesy of GENERAL MOTORS COMPANY

    Install the EN-36857  Engine Lift Bracket (1) using the EN-52059  Engine Support Fixture Adapter Bolt - M10 (2) to the cylinder head and hand tighten.

  175. GM5043649Courtesy of GENERAL MOTORS COMPANY

    Air Conditioning Compressor and Condenser Hose - Position aside

  176. GM5620579Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

    Electrical Connector @ Heater Coolant Pump (2) - Disconnect

  177. Heater Water Auxiliary Pump Bolt (1) - Remove
  178. Remove the heater coolant pump and heater water auxiliary pump bracket (2) as assembly and position aside.
  179. GM5569719Courtesy of GENERAL MOTORS COMPANY

    Starter Heat Shield Bolt (1) - Remove [ 2x ]

  180. GM5569721Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Catalytic converter removed for graphic clarity.

    Starter Heat Shield Bolt (1) - Remove

  181. Starter Heat Shield (2) - Remove
  182. GM5569769Courtesy of GENERAL MOTORS COMPANY

    Battery Negative Cable Ground Bolt (1) - Remove

  183. Starter Solenoid Cable (2) - Reposition away
  184. GM5569758Courtesy of GENERAL MOTORS COMPANY

    Starter Mounting Bolt (1) - Remove [ 2x ]

  185. Reposition the starter (2) to access the electrical connections.
  186. GM5569840Courtesy of GENERAL MOTORS COMPANY

    Protective Sleeve (4) - Reposition

  187. Starter Solenoid Cable Nut (2) - Remove
  188. Starter Solenoid Cable (1) - Remove
  189. Electrical Connector (3) - Disconnect
  190. GM5569910Courtesy of GENERAL MOTORS COMPANY

    Starter (1) - Remove

  191. GM5585541Courtesy of GENERAL MOTORS COMPANY

    Transmission Converter Cover Bolt (1) - Remove

  192. Transmission Converter Cover-Left Side (2) - Remove
  193. GM5585543Courtesy of GENERAL MOTORS COMPANY

    Transmission Converter Cover Bolt (1) - Remove

  194. Transmission Converter Cover-Right Side (2) - Remove
  195. GM4997286Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Hose Bracket Nut (1) - Remove

  196. GM4997823Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Pressure Sensor Sleeve (1) - Remove

  197. GM5582300Courtesy of GENERAL MOTORS COMPANY

    Electrical Connector (1) @ Engine Oil Pressure Sensor - Disconnect

  198. Wiring Harness Retainer (2) @ Engine Oil Cooler Hose - Remove
  199. GM5582326Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Hose Bolt (1) - Remove [ 2x ]

  200. GM5582330Courtesy of GENERAL MOTORS COMPANY

    Engine Oil Cooler Hose (1) @ Oil Pan - Reposition

  201. Engine Oil Cooler Gasket (2) - Remove and DISCARD
  202. GM5021981Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission fluid auxiliary cooler pipe bracket nut (1).

  203. Remove the transmission fluid cooler inlet and outlet pipe bracket (2) from the engine.
  204. GM5644061Courtesy of GENERAL MOTORS COMPANY

    Engine Wiring Harness Retainer (2) - Remove

  205. Engine Wiring Harness Ground Stud (1) - Remove [ 2x ]
  206. Engine Wiring Harness (3) @ Oil Pan - Reposition
  207. GM5644122Courtesy of GENERAL MOTORS COMPANY

    Transmission Fluid Cooler Pipe Clip Bolt (1) @ Oil Pan - Remove

  208. NOTE:

    Components removed in graphic to better illustrate service parts.

  209. Transmission Fluid Cooler Pipe Clip Bracket (2) @ Oil Pan - Remove
  210. GM5608335Courtesy of GENERAL MOTORS COMPANY

    Reposition the transmission cooler inlet and outlet pipe (1) as necessary.

  211. GM5565710Courtesy of GENERAL MOTORS COMPANY

    { If equipped } Remove the 3 wiring harness retainers (1) from the transmission support crossmember, and reposition the wiring harness (2) as necessary.

  212. Support the transmission with a suitable jack.
  213. GM4974116Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Nut (1) - Remove

  214. GM4974118Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember Nut (1) - Remove [ 4x ]

  215. Transmission Support Crossmember Bolt (2) - Remove [ 4x ]
  216. GM4974120Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember (1) - Remove

  217. GM5508824Courtesy of GENERAL MOTORS COMPANY

    Exhaust Heat Shield Bolt- Left Side (1) - Remove

  218. Exhaust Front Pipe Heat Shield- Left Side (2) - Remove
  219. GM5508826Courtesy of GENERAL MOTORS COMPANY

    Exhaust Heat Shield Bolt- Right Side (1) - Remove

  220. Exhaust Front Pipe Heat Shield- Right Side (2) - Remove
  221. GM5525401Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    NOTE:
    • The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the heated oxygen sensor (1).
    • The heated oxygen sensor (1) MAY be difficult to remove when the engine temperature is less than 48°C (120°F).

    Electrical Connector @ Heated Oxygen Sensor- Bank 1 Sensor 1 - Disconnect

  222. Using a suitable tool, remove the heated oxygen sensor (1).
  223. GM5523087Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    Electrical Connector @ Heated Oxygen Sensor- Bank 1 Sensor 2 - Disconnect

  224. GM5568855Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    NOTE:
    • The heated oxygen sensor in-line connector and louvered end MUST be kept clear of all grease, dirt, and other contaminants. Do NOT use cleaning solvents of any type. Do NOT drop or roughly handle the sensor.
    • The heated oxygen sensor MAY be difficult to remove when the engine temperature is less than 48°C (120°F).

    Electrical Connector @ Heated Oxygen Sensor- Bank 2 Sensor 1 - Disconnect

  225. Using a suitable tool, remove the heated oxygen sensor (1).
  226. GM5523023Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    Electrical Connector @ Heated Oxygen Sensor- Bank 2 Sensor 2 - Disconnect

  227. GM5001054Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    Exhaust Pipe Clamp (1) - Loosen

  228. Exhaust Muffler (2) @ Three-Way Catalytic Converter (3) - Separate
  229. GM5584496Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

    Exhaust Front Pipe Nut- Left Side (1) - Remove [ 3x ]

  230. GM5584486Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    In order to avoid being burned, do not service the exhaust system while it is still hot. Service the system when it is cool.

    Exhaust Front Pipe Nut- Right Side (1) - Remove [ 3x ]

  231. GM5001076Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Avoid contact with HOT components. Wear safety glasses and protective gloves to avoid personal injury.

    Three-Way Catalytic Converter (1) - Remove

  232. GM5001105Courtesy of GENERAL MOTORS COMPANY

    Exhaust System Seal (1) - Remove and DISCARD

  233. GM5001113Courtesy of GENERAL MOTORS COMPANY

    Exhaust System Seal (1) - Remove and DISCARD

  234. GM5608206Courtesy of GENERAL MOTORS COMPANY

    Repeat the following steps for all transmission torque converter bolts (1):

    1. Rotate the harmonic balancer center bolt clockwise ONLY, to align the transmission torque converter bolt with the starter opening.
    2. Transmission Torque Converter Bolt (1) - Remove [ 6x ]
  235. Lower the transmission to gain access to the top and sides of the transmission.
  236. GM5020629Courtesy of GENERAL MOTORS COMPANY

    Remove the transmission vent hose clip bracket nut (1).

  237. Remove the transmission vent hose clip bracket (2) from the transmission.
  238. GM5021402Courtesy of GENERAL MOTORS COMPANY

    Remove the fuel feed and return front hose bracket nut (1).

  239. Remove the fuel feed and return front hose bracket bolt (2).
  240. Reposition the fuel feed and return front hose (3) as necessary.
  241. GM5608334Courtesy of GENERAL MOTORS COMPANY

    Transmission Stud (1) - Remove [ 5x ]

  242. Raise the transmission to the original installation position.
  243. GM4974120Courtesy of GENERAL MOTORS COMPANY

    Transmission Support Crossmember (1) - Install

  244. GM4974118Courtesy of GENERAL MOTORS COMPANY

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

  245. Transmission Support Crossmember Nut (1) - Install and hand tighten [ 4x ]
  246. GM4974116Courtesy of GENERAL MOTORS COMPANY

    Transmission Mount Nut (1) - Install and hand tighten

  247. GM5608354Courtesy of GENERAL MOTORS COMPANY

    Transmission Stud (1) - Remove

  248. Transmission Bolt (2) - Remove [ 2x ]
  249. Remove the support and lower the vehicle.
  250. GM5297905Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Broken engine mountings can cause misalignment of certain drive-train components. Misalignment of drive-train components causes eventual destruction of the drive-train components.

    If one engine mount breaks, the rest of the engine mounts will have increased stress put on them. This could cause the rest of the engine mounts to break.

    NOTE:

    Work through the front wheelhouse opening to access the 3 engine mount frame side bolts (1).

    Engine Mount Frame Side Bolt- Left Side (1) - Remove [ 3x ]

  251. GM5033661Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Broken engine mountings can cause misalignment of certain drive-train components. Misalignment of drive-train components causes eventual destruction of the drive-train components.

    If one engine mount breaks, the rest of the engine mounts will have increased stress put on them. This could cause the rest of the engine mounts to break.

    NOTE:

    Work through the front wheelhouse opening to access the 3 engine mount frame side bolts (1).

    Engine Mount Frame Side Bolt- Right Side (1) - Remove [ 3x ]

  252. Install a suitable chain to the two engine lift brackets to support the engine.
  253. Use a suitable stand to support the transmission.
  254. Ensure that all electrical connectors are disconnected at this time.
  255. Using a suitable engine lifting device, remove the engine from the vehicle.
  256. GM5608009Courtesy of GENERAL MOTORS COMPANY

    Install the DT-21366  Converter Holding Strap (1) onto the transmission to retain the torque converter.

  257. GM5587488Courtesy of GENERAL MOTORS COMPANY

    Mount the engine (1) onto the engine stand (2).

  258. Using the appropriate tool, clean and prepare the applicable sealing surface.