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Home >> Chevrolet >> 2021 >> Tahoe Z71 >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 5.3L (L84) Or 6.2L (L87) - Repair Instructions (10 Of 11) >> 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 (9C1, 5W4) , or Battery Negative Cable Disconnection and Connection (KL9)
  4. Front Wheelhouse Liner- Left Side and Right Side - Remove [2x] - Front Wheelhouse Liner Replacement
  5. Hood Latch Actuator Bolt (1) - Remove [2x]
    GM5541781Courtesy of GENERAL MOTORS COMPANY
  6. Hood Secondary Latch Release Handle (2) - Remove
  7. Intake Air Baffle Retainer (1) - Remove [9x]
    GM5541784Courtesy of GENERAL MOTORS COMPANY
  8. Intake Air Splash Shield (2) - Remove
  9. Remove the left and right side front bumper fascia bolt (1).
    GM5537668Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  10. Loosen the 2 left and right side front bumper fascia guide bolts (1).
    GM5537669Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  11. Remove the left and right side front bumper fascia bolt (2).
  12. Front Bumper Fascia Skid Plate Bolt (1) - Remove [4x]
    GM5537670Courtesy of GENERAL MOTORS COMPANY
  13. Remove the left and right side front bumper fascia support brace bolt (1).
    GM5549574Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  14. Front Grille Bolt (1) - Remove [6x]
    GM5537672Courtesy of GENERAL MOTORS COMPANY
  15. Apply a double layer of masking tape to the left and right headlamp to prevent damaging / scratching the headlamp lens.
    GM5537674Courtesy of GENERAL MOTORS COMPANY
  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 outside of the headlamp, release the front bumper fascia (1) from the headlamp.
  18. Disconnect the electrical connector.
    GM5537676Courtesy of GENERAL MOTORS COMPANY
  19. Release the 9 grille clips (1).
  20. With the aid of an assistant, remove the fascia. (2)
  21. Underbody Skid Shield Bolt (1) - Remove [4x]
    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.

  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. Disconnect the electrical connectors. (1)
    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.
  26. Disconnect the electrical connector. (1)
    GM5535962Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Parts removed from graphic for clarity.

  27. { If equipped }Engine Coolant Heater Cord (1) @Engine Coolant Heater - Disconnect
    GM5022643Courtesy of GENERAL MOTORS COMPANY
  28. Air Cleaner Outlet Duct Bracket Bolt (1) - Remove
    GM5001375Courtesy of GENERAL MOTORS COMPANY
  29. Engine Wiring Harness@Air Cleaner Outlet Duct Bracket - Remove
  30. Air Cleaner Outlet Duct Clamp (2) - Loosen [2x]
    GM5551440Courtesy of GENERAL MOTORS COMPANY
  31. Positive Crankcase Ventilation Fresh Air Tube (1) - Disconnect - Plastic Collar Quick Connect Fitting Service
  32. Air Cleaner Outlet Duct (3) - Remove
  33. Headlamp Bolt- Left Side and Right Side (1) - Remove [6x]
    GM5520779Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  34. Headlamp Bolt- Left Side and Right Side (1) - Remove [6x]
    GM5520782Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  35. Release the front headlamp guide pin from the front bumper fascia guide (1).
    GM5520784Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Left side shown, right side similar.

  36. Front Headlamp- Left Side and Right Side (2) - Remove
  37. Release the wiring harness retaining tab.
  38. Disconnect all electrical connectors.
  39. Loosen the left and right side front bumper fascia upper stiffener nut (1).
    GM5544167Courtesy of GENERAL MOTORS COMPANY
  40. Remove the left and right side front bumper fascia upper stiffener bolt (2).
  41. Pull the front bumper fascia upper stiffener (1) up and out over the stud.
    GM5544169Courtesy of GENERAL MOTORS COMPANY
  42. Front Bumper Shutter Bolt (1) - Remove [9x]
    GM5548894Courtesy of GENERAL MOTORS COMPANY
  43. Disconnect the electrical connector and reposition wiring harness.
  44. Front Bumper Shutter (2) - Remove
  45. Intake Air Duct Retainer (1) - Remove
    GM5020580Courtesy of GENERAL MOTORS COMPANY
  46. Intake Air Duct (2) - Remove
  47. Disconnect the mass airflow sensor electrical connector (1) and remove all engine wiring harnesses from the air cleaner assembly.
    GM5587671Courtesy of GENERAL MOTORS COMPANY
  48. Air Cleaner Nut (1) - Remove
    GM5020719Courtesy of GENERAL MOTORS COMPANY
  49. Air Cleaner Assembly (2) - Remove
  50. Plenum Front Panel Outer Reinforcement (1) - Remove - Plenum Front Panel Outer Reinforcement Removal and Installation
    GM5571687Courtesy of GENERAL MOTORS COMPANY
  51. Radiator Air Side Baffle Retainer (1) - Remove [4x]
    GM5010400Courtesy of GENERAL MOTORS COMPANY
  52. Radiator Air Side Baffle - Remove
  53. Radiator Air Side Baffle Retainer (2) - Remove
    GM5569434Courtesy of GENERAL MOTORS COMPANY
  54. Radiator Air Side Baffle - Left Side (1) - Remove
  55. Front End Sheet Metal Diagonal Brace Bolt (1) @Upper Tie Bar - Remove [4x]
    GM5568597Courtesy of GENERAL MOTORS COMPANY
  56. Front End Sheet Metal Diagonal Brace (2) @Upper Tie Bar - Remove [2x]
  57. Release the 6 integral retaining features (1).
    GM5568592Courtesy of GENERAL MOTORS COMPANY
  58. Radiator Air Upper Baffle (2) - Remove
  59. Front End Sheet Metal Diagonal Brace Bolt- Left Side and Right Side (1) - Remove [4x]
    GM5572426Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Right side shown, left side similar.

  60. Front End Sheet Metal Diagonal Brace- Left Side and Right Side (2) @Radiator Support - Remove [2x]
  61. Reposition the hood primary latch release cable (1) from the upper tie bar retainer (2).
    GM5573123Courtesy of GENERAL MOTORS COMPANY
  62. Hood Primary Latch Release Cable (1) - Disconnect@Hood Primary Latch
  63. Disconnect the electrical connector.
  64. Electrical Connector (2) - Disconnect
    GM5582568Courtesy of GENERAL MOTORS COMPANY
  65. Front Grille Support Bracket Bolt (1) - Remove [4x]
    GM5552336Courtesy of GENERAL MOTORS COMPANY
  66. Front Grille Support Reinforcement (2) - Remove
  67. Front End Upper Tie Bar Bolt- Left Side (1) - Remove [3x]
    GM5605759Courtesy of GENERAL MOTORS COMPANY
  68. Front End Upper Tie Bar Bolt- Right Side (1) - Remove [3x]
    GM5605761Courtesy of GENERAL MOTORS COMPANY
  69. Front End Upper Tie Bar Bolt (1) @Headlamp Bracket - Remove [2x]
    GM5605760Courtesy of GENERAL MOTORS COMPANY
  70. Front End Upper Tie Bar Bolt (2) - Remove
  71. Front End Upper Tie Bar Bolt- Right Side (1) - Remove
    GM5605762Courtesy of GENERAL MOTORS COMPANY
  72. Front End Upper Tie Bar Bolt (1) @Headlamp Bracket - Remove [8x]
    GM5666045Courtesy of GENERAL MOTORS COMPANY
  73. Headlamp Bracket (2) - Remove [2x]
  74. Front End Upper Tie Bar (1) - Remove
    GM5605789Courtesy of GENERAL MOTORS COMPANY
  75. Disconnect the wiring harness from the front end upper tie bar.
  76. Radiator Surge Tank Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5568590Courtesy of GENERAL MOTORS COMPANY
  77. Radiator Surge Tank Inlet Hose (2) @Engine Radiator - Remove and position aside
  78. Retaining Tab (1) - Disengage [2x]
    GM5572790Courtesy of GENERAL MOTORS COMPANY
  79. Engine Wiring Harness Junction Block Cover (2) - Remove
  80. Battery Positive Cable Nut (3) - Remove
  81. Starter Solenoid Cable (4) - Remove
  82. Engine Wiring Harness Junction Block Bolt (2) - Loosen [4x]
    GM5572883Courtesy of GENERAL MOTORS COMPANY
  83. Retaining Tab (1) - Disengage [4x]
  84. Engine Wiring Harness Junction Block (3) - Remove
  85. Electrical Connector (1) - Remove [4x]
    GM5573073Courtesy of GENERAL MOTORS COMPANY
  86. Engine Wiring Harness Fuse Block Bracket Bolt (2) - Remove [2x]
    GM5573198Courtesy of GENERAL MOTORS COMPANY
  87. Retaining Tab (1) - Disengage
  88. Engine Wiring Harness Fuse Block Bracket (3) - Remove
  89. Heater Outlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5568620Courtesy of GENERAL MOTORS COMPANY
  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. Radiator Inlet Hose Clip (2) - Remove
    GM5568866Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  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. Wiring Harness Retainer (1) - Remove [2x]
    GM5568870Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

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

    Some components not shown for graphic clarity.

  99. Electrical Connector (1) - Disconnect
  100. Wiring Harness (3) - Position aside
  101. Engine Oil Cooler Retainer (2) - Remove [2x]
    GM5568876Courtesy of GENERAL MOTORS COMPANY
  102. Engine Oil Cooler Pipe Bracket Bolt (3) - Remove
  103. Engine Oil Cooler Hose (1) @Engine Radiator - Remove [2x]
  104. Transmission Fluid Auxiliary Cooler Pipe Bolt (1) - Remove
    GM5569435Courtesy of GENERAL MOTORS COMPANY
  105. Transmission Fluid Cooler Pipe Clip (2) - Remove [2x]
  106. Transmission Fluid Cooler Pipe Nut (1) - Remove
    GM5569446Courtesy of GENERAL MOTORS COMPANY
  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. Transmission Fluid Cooler Pipe Nut (1) - Remove
    GM5569448Courtesy of GENERAL MOTORS COMPANY
  110. Transmission Fluid Cooler Inlet and Outlet Pipe (1) @Transmission Fluid Auxiliary Cooler - Remove and position aside
    GM5569449Courtesy of GENERAL MOTORS COMPANY
  111. Transmission Fluid Cooler Pipe Fitting Seal (2) - Remove and DISCARD
  112. Transmission Fluid Cooler Pipe Clip (1) - Release
    GM5569584Courtesy of GENERAL MOTORS COMPANY
  113. Air Conditioning Compressor and Condenser Hose Nut (1) - Remove
    GM5569587Courtesy of GENERAL MOTORS COMPANY
  114. Air Conditioning Compressor and Evaporator Hose Nut (2) - Remove
  115. Air Conditioning Compressor and Condenser Hose (1) @Air Conditioning Condenser - Remove
    GM5569588Courtesy of GENERAL MOTORS COMPANY
  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. Radiator Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5569581Courtesy of GENERAL MOTORS COMPANY
  119. Radiator Outlet Hose (2) @Engine Radiator - Remove
  120. Rotate the top of the condenser, fan and radiator assembly (1) rearward and lift it out of the engine compartment.
    GM5569590Courtesy of GENERAL MOTORS COMPANY
  121. Heater Inlet Hose (3) @Heater Inlet and Outlet Hose Clip (1) - Remove
    GM4997349Courtesy of GENERAL MOTORS COMPANY
  122. Heater Outlet Hose (3) @Heater Inlet and Outlet Hose Clip (1) - Remove
    GM5581805Courtesy of GENERAL MOTORS COMPANY
  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. Using a suitable tool, cut the accessory drive primary belt (1).
    GM5606792Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The accessory drive primary belt is not reusable.

    Some components not shown for graphic clarity.

  127. Accessory Drive Primary Belt (1) - Remove and DISCARD
  128. Using a suitable tool, cut the accessory drive auxiliary belt (1).
    GM5606811Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The accessory drive auxiliary belt is not reusable.

  129. Accessory Drive Auxiliary Belt (1) - Remove and DISCARD
  130. Battery Positive Cable Nut (1) - Remove
    GM5573641Courtesy of GENERAL MOTORS COMPANY
  131. Starter Solenoid Cable (2) - Remove
  132. Electrical Connector (3) - Disconnect
  133. Generator Bolt (1) - Remove [2x]
    GM5642527Courtesy of GENERAL MOTORS COMPANY
  134. Generator (1) - Remove
    GM5642615Courtesy of GENERAL MOTORS COMPANY
  135. Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type
    GM4994147Courtesy of GENERAL MOTORS COMPANY
  136. Heater Inlet Hose (2) @Water Pump - Remove
  137. Heater Water Auxiliary Pump Hose (3) @Water Pump - Remove
  138. Radiator Outlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM4994158Courtesy of GENERAL MOTORS COMPANY
  139. Radiator Outlet Hose (2) @Water Pump - Remove
  140. Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type
    GM4994407Courtesy of GENERAL MOTORS COMPANY
  141. Engine Coolant Air Bleed Hose (2) @Water Pump - Remove
  142. Radiator Inlet Hose (3) @Water Pump - Remove
  143. Engine Coolant Temperature Sensor Electrical Connector (1) - Disconnect
    GM4994461Courtesy of GENERAL MOTORS COMPANY
  144. Electrical Connector (1) @Air Conditioning Compressor - Disconnect
    GM5619709Courtesy of GENERAL MOTORS COMPANY
  145. Air Conditioning Compressor Bolt (1) - Remove
    GM5585694Courtesy of GENERAL MOTORS COMPANY
  146. Air Conditioning Compressor Nut (2) - Remove
  147. Air Conditioning Compressor Stud (3) - Remove
  148. Air Conditioning Compressor (1) - Position aside
    GM5585692Courtesy of GENERAL MOTORS COMPANY
  149. Water Pump Housing Bolt (1) - Remove [6x]
    GM4994474Courtesy of GENERAL MOTORS COMPANY
  150. Water Pump (1) - Remove
    GM5587617Courtesy of GENERAL MOTORS COMPANY
  151. Water Pump Gasket (2) - Remove and DISCARD [2x]
  152. Evaporative Emission Canister Purge Tube Connector (1) @Evaporative Emission Canister Purge Solenoid Valve - Disengage - Plastic Collar Quick Connect Fitting Service
    GM5538400Courtesy of GENERAL MOTORS COMPANY
  153. Evaporative Emission Canister Purge Tube (2) @Evaporative Emission Canister Purge Solenoid Valve - Remove and position aside
  154. Engine Wiring Harness Connector (1) @Throttle Body - Disconnect
    GM5540971Courtesy of GENERAL MOTORS COMPANY
  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. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [4x]
    GM5540973Courtesy of GENERAL MOTORS COMPANY
  159. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [3x]
    GM5540974Courtesy of GENERAL MOTORS COMPANY
  160. Positive Crankcase Ventilation Tube Connector (2) @Intake Manifold - Disconnect and reposition - Plastic Collar Quick Connect Fitting Service
    GM5527888Courtesy of GENERAL MOTORS COMPANY
  161. Loosen the 10 intake manifold bolts (1) until the bolts are no longer threaded into the cylinder heads.
    GM5540977Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  162. Move the intake manifold and intake manifold cover (2) forward enough to gain access to the rear engine wiring harness retainers.
  163. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [4x]
    GM5540975Courtesy of GENERAL MOTORS COMPANY
  164. Remove the intake manifold and intake manifold cover (1) as an assembly.
    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.

  165. Cover the cylinder head passages in order to prevent dirt or debris from entering the passages.
  166. Intake Manifold Gasket (1) - Remove and DISCARD [8x]
    GM5541471Courtesy of GENERAL MOTORS COMPANY
  167. Fuel Pump Insulator (1) - Remove
    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.

  168. Fuel Feed Pipe (1) - Disconnect - Metal Collar Quick Connect Fitting Service
    GM5569054Courtesy of GENERAL MOTORS COMPANY
  169. Fuel Feed Pipe (1) - Reposition
  170. Electrical Connector (1) @Fuel Rail Pressure Sensor (2) - Disconnect
    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.

  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. 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.
    GM5053741Courtesy of GENERAL MOTORS COMPANY
  174. 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.
    GM5053735Courtesy of GENERAL MOTORS COMPANY
  175. Air Conditioning Compressor and Condenser Hose - Position aside
    GM5043649Courtesy of GENERAL MOTORS COMPANY
  176. Electrical Connector@Heater Coolant Pump (2) - Disconnect
    GM5620579Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  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. Starter Heat Shield Bolt (1) - Remove [2x]
    GM5569719Courtesy of GENERAL MOTORS COMPANY
  180. Starter Heat Shield Bolt (1) - Remove
    GM5569721Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Catalytic converter removed for graphic clarity.

  181. Starter Heat Shield (2) - Remove
  182. Battery Negative Cable Ground Bolt (1) - Remove
    GM5569769Courtesy of GENERAL MOTORS COMPANY
  183. Starter Solenoid Cable (2) - Reposition away
  184. Starter Mounting Bolt (1) - Remove [2x]
    GM5569758Courtesy of GENERAL MOTORS COMPANY
  185. Reposition the starter (2) to access the electrical connections.
  186. Protective Sleeve (4) - Reposition
    GM5569840Courtesy of GENERAL MOTORS COMPANY
  187. Starter Solenoid Cable Nut (2) - Remove
  188. Starter Solenoid Cable (1) - Remove
  189. Electrical Connector (3) - Disconnect
  190. Starter (1) - Remove
    GM5569910Courtesy of GENERAL MOTORS COMPANY
  191. Transmission Converter Cover Bolt (1) - Remove
    GM5585541Courtesy of GENERAL MOTORS COMPANY
  192. Transmission Converter Cover-Left Side (2) - Remove
  193. Transmission Converter Cover Bolt (1) - Remove
    GM5585543Courtesy of GENERAL MOTORS COMPANY
  194. Transmission Converter Cover-Right Side (2) - Remove
  195. Engine Oil Cooler Hose Bracket Nut (1) - Remove
    GM4997286Courtesy of GENERAL MOTORS COMPANY
  196. Engine Oil Pressure Sensor Sleeve (1) - Remove
    GM4997823Courtesy of GENERAL MOTORS COMPANY
  197. Electrical Connector (1) @Engine Oil Pressure Sensor - Disconnect
    GM5582300Courtesy of GENERAL MOTORS COMPANY
  198. Wiring Harness Retainer (2) @Engine Oil Cooler Hose - Remove
  199. Engine Oil Cooler Hose Bolt (1) - Remove [2x]
    GM5582326Courtesy of GENERAL MOTORS COMPANY
  200. Engine Oil Cooler Hose (1) @Oil Pan - Reposition
    GM5582330Courtesy of GENERAL MOTORS COMPANY
  201. Engine Oil Cooler Gasket (2) - Remove and DISCARD
  202. Remove the transmission fluid auxiliary cooler pipe bracket nut (1).
    GM5021981Courtesy of GENERAL MOTORS COMPANY
  203. Remove the transmission fluid cooler inlet and outlet pipe bracket (2) from the engine.
  204. Engine Wiring Harness Retainer (2) - Remove
    GM5644061Courtesy of GENERAL MOTORS COMPANY
  205. Engine Wiring Harness Ground Stud (1) - Remove [2x]
  206. Engine Wiring Harness (3) @Oil Pan - Reposition
  207. Transmission Fluid Cooler Pipe Clip Bolt (1) @Oil Pan - Remove
    GM5644122Courtesy of GENERAL MOTORS COMPANY
  208. NOTE:

    Components removed in graphic to better illustrate service parts.

  209. Transmission Fluid Cooler Pipe Clip Bracket (2) @Oil Pan - Remove
  210. Reposition the transmission cooler inlet and outlet pipe (1) as necessary.
    GM5608335Courtesy of GENERAL MOTORS COMPANY
  211. { If equipped } Remove the 3 wiring harness retainers (1) from the transmission support crossmember, and reposition the wiring harness (2) as necessary.
    GM5565710Courtesy of GENERAL MOTORS COMPANY
  212. Support the transmission with a suitable jack.
  213. Transmission Mount Nut (1) - Remove
    GM4974116Courtesy of GENERAL MOTORS COMPANY
  214. Transmission Support Crossmember Nut (1) - Remove [4x]
    GM4974118Courtesy of GENERAL MOTORS COMPANY
  215. Transmission Support Crossmember Bolt (2) - Remove [4x]
  216. Transmission Support Crossmember (1) - Remove
    GM4974120Courtesy of GENERAL MOTORS COMPANY
  217. Exhaust Heat Shield Bolt- Left Side (1) - Remove
    GM5508824Courtesy of GENERAL MOTORS COMPANY
  218. Exhaust Front Pipe Heat Shield- Left Side (2) - Remove
  219. Exhaust Heat Shield Bolt- Right Side (1) - Remove
    GM5508826Courtesy of GENERAL MOTORS COMPANY
  220. Exhaust Front Pipe Heat Shield- Right Side (2) - Remove
  221. Electrical Connector@Heated Oxygen Sensor- Bank 1 Sensor 1 - Disconnect
    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).
  222. Using a suitable tool, remove the heated oxygen sensor (1).
  223. Electrical Connector@Heated Oxygen Sensor- Bank 1 Sensor 2 - Disconnect
    GM5523087Courtesy of GENERAL MOTORS COMPANY
    WARNING:

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

  224. Electrical Connector@Heated Oxygen Sensor- Bank 2 Sensor 1 - Disconnect
    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).
  225. Using a suitable tool, remove the heated oxygen sensor (1).
  226. Electrical Connector@Heated Oxygen Sensor- Bank 2 Sensor 2 - Disconnect
    GM5523023Courtesy of GENERAL MOTORS COMPANY
    WARNING:

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

  227. Exhaust Pipe Clamp (1) - Loosen
    GM5001054Courtesy of GENERAL MOTORS COMPANY
    WARNING:

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

  228. Exhaust Muffler (2) @Three-Way Catalytic Converter (3) - Separate
  229. Exhaust Front Pipe Nut- Left Side (1) - Remove [3x]
    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.

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

  231. Three-Way Catalytic Converter (1) - Remove
    GM5001076Courtesy of GENERAL MOTORS COMPANY
    WARNING:

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

  232. Exhaust System Seal (1) - Remove and DISCARD
    GM5001105Courtesy of GENERAL MOTORS COMPANY
  233. Exhaust System Seal (1) - Remove and DISCARD
    GM5001113Courtesy of GENERAL MOTORS COMPANY
  234. Repeat the following steps for all torque converter bolts (1) :
    GM5608206Courtesy of GENERAL MOTORS COMPANY
    1. Rotate the harmonic balancer center bolt clockwise ONLY, to align the torque converter bolt with the starter opening.
    2. Torque Converter Bolt (1) - Remove [6x]
  235. Lower the transmission to gain access to the top and sides of the transmission.
  236. Remove the transmission vent hose clip bracket nut (1).
    GM5020629Courtesy of GENERAL MOTORS COMPANY
  237. Remove the transmission vent hose clip bracket (2) from the transmission.
  238. Remove the fuel feed and return front hose bracket nut (1).
    GM5021402Courtesy of GENERAL MOTORS COMPANY
  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. Transmission Stud (1) - Remove [5x]
    GM5608334Courtesy of GENERAL MOTORS COMPANY
  242. Raise the transmission to the original installation position.
  243. Transmission Support Crossmember (1) - Install
    GM4974120Courtesy of GENERAL MOTORS COMPANY
  244. Transmission Support Crossmember Bolt (2) - Install [4x]
    GM4974118Courtesy of GENERAL MOTORS COMPANY
  245. Transmission Support Crossmember Nut (1) - Install and hand tighten [4x]
  246. Transmission Mount Nut (1) - Install and hand tighten
    GM4974116Courtesy of GENERAL MOTORS COMPANY
  247. Transmission Stud (1) - Remove
    GM5608354Courtesy of GENERAL MOTORS COMPANY
  248. Transmission Bolt (2) - Remove [2x]
  249. Remove the support and lower the vehicle.
  250. Engine Mount Frame Side Bolt- Left Side (1) - Remove [3x]
    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).

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

  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. Install the DT-21366  Converter Holding Strap (1) onto the transmission to retain the torque converter.
    GM5608009Courtesy of GENERAL MOTORS COMPANY
  257. Mount the engine (1) onto the engine stand (2).
    GM5587488Courtesy of GENERAL MOTORS COMPANY
  258. Using the appropriate tool, clean and prepare the applicable sealing surface.