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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 (3 Of 11) >> Repair Instructions >> Camshaft Replacement (L84, 2WD with RC1) >> Removal Procedure

Removal Procedure

  1. Relieve the fuel system pressure. Fuel Pressure Relief
  2. Drain the cooling system. Cooling System Draining and Filling (GE 47716 L84, L87) , or Cooling System Draining and Filling (Static L84, L87)
  3. Recover the refrigerant. Refrigerant Recovery and Recharging
  4. Remove the negative battery cable from the battery. Battery Negative Cable Disconnection and Connection (9C1, 5W4) , or Battery Negative Cable Disconnection and Connection (KL9)
  5. Air Cleaner Outlet Duct Clamp (1) - Loosen
    GM5503496Courtesy of GENERAL MOTORS COMPANY
  6. Disconnect the mass airflow sensor electrical connector (2) and remove all engine wiring harnesses from the air cleaner assembly.
  7. Air Cleaner Outlet Duct (1) - Reposition away
    GM5503517Courtesy of GENERAL MOTORS COMPANY
  8. Air Cleaner Nut (2) - Remove
  9. Hood Latch Actuator Bolt (1) - Remove [2x]
    GM5541781Courtesy of GENERAL MOTORS COMPANY
  10. Hood Secondary Latch Release Handle (2) - Remove
  11. Intake Air Baffle Retainer (1) - Remove [9x]
    GM5541732Courtesy of GENERAL MOTORS COMPANY
  12. Intake Air Splash Shield (2) - Remove
  13. Intake Air Duct Retainer (1) - Remove
    GM5503528Courtesy of GENERAL MOTORS COMPANY
  14. Air Cleaner Assembly (1) - Remove
    GM5503547Courtesy of GENERAL MOTORS COMPANY
  15. Air Cleaner Outlet Duct Bracket Bolt (1) - Remove
    GM5001375Courtesy of GENERAL MOTORS COMPANY
  16. Remove the engine wiring harness from the air cleaner outlet duct bracket.
  17. Positive Crankcase Ventilation Fresh Air Tube (3) - Disconnect - Plastic Collar Quick Connect Fitting Service
    GM5581741Courtesy of GENERAL MOTORS COMPANY
  18. Air Cleaner Outlet Duct Clamp (2) - Loosen
  19. Air Cleaner Outlet Duct (1) - Remove
  20. Radiator Surge Tank Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5568590Courtesy of GENERAL MOTORS COMPANY
  21. Radiator Surge Tank Inlet Hose (2) @Engine Radiator - Remove and position aside
  22. Front End Sheet Metal Diagonal Brace Bolt (1) @Upper Tie Bar - Remove [4x]
    GM5568597Courtesy of GENERAL MOTORS COMPANY
  23. Front End Sheet Metal Diagonal Brace (2) @Upper Tie Bar - Remove [2x]
  24. Release the 6 integral retaining features (1).
    GM5568592Courtesy of GENERAL MOTORS COMPANY
  25. Radiator Air Upper Baffle (2) - Remove
  26. Retaining Tab (1) - Disengage [2x]
    GM5572790Courtesy of GENERAL MOTORS COMPANY
  27. Engine Wiring Harness Junction Block Cover (2) - Remove
  28. Battery Positive Cable Nut (3) - Remove
  29. Starter Solenoid Cable (4) - Remove
  30. Engine Wiring Harness Junction Block Bolt (2) - Loosen [4x]
    GM5572883Courtesy of GENERAL MOTORS COMPANY
  31. Retaining Tab (1) - Disengage [4x]
  32. Engine Wiring Harness Junction Block (3) - Remove
  33. Electrical Connector (1) - Remove [4x]
    GM5573073Courtesy of GENERAL MOTORS COMPANY
  34. Engine Wiring Harness Fuse Block Bracket Bolt (2) - Remove [2x]
    GM5573198Courtesy of GENERAL MOTORS COMPANY
  35. Retaining Tab (1) - Disengage
  36. Engine Wiring Harness Fuse Block Bracket (3) - Remove
  37. Remove the engine wiring harness fuse block bracket.
  38. Radiator Surge Tank Outlet Hose Clip (2) - Remove [2x]
    GM5568620Courtesy of GENERAL MOTORS COMPANY
  39. Radiator Surge Tank Outlet Hose (3) - Reposition
  40. Radiator Inlet Hose Clip (2) - Remove
    GM5568866Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  41. Radiator Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
  42. Radiator Inlet Hose (3) @Engine Radiator - Remove and position aside
  43. Wiring Harness Retainer (1) - Remove [2x]
    GM5568870Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

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

    Some components not shown for graphic clarity.

  47. Electrical Connector (1) - Disconnect
  48. Wiring Harness (3) - Position aside
  49. Engine Oil Cooler Hose Clip (1) - Release
    GM5568873Courtesy of GENERAL MOTORS COMPANY
  50. Engine Oil Cooler Retainer (2) - Remove [2x]
    GM5568876Courtesy of GENERAL MOTORS COMPANY
  51. Engine Oil Cooler Pipe Bracket Bolt (3) - Remove
  52. Engine Oil Cooler Hose (1) @Engine Radiator - Remove [2x]
  53. Radiator Air Side Baffle Retainer (1) - Remove [4x]
    GM5569421Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  54. Radiator Air Side Baffle - Right Side (2) - Reposition
  55. Radiator Air Side Baffle Retainer (2) - Remove
    GM5569434Courtesy of GENERAL MOTORS COMPANY
  56. Radiator Air Side Baffle - Left Side (1) - Reposition
  57. Transmission Fluid Cooler Pipe Bolt (1) - Remove
    GM5569435Courtesy of GENERAL MOTORS COMPANY
  58. Transmission Fluid Cooler Pipe Clip (2) - Remove [2x]
  59. Transmission Fluid Cooler Pipe Nut (1) - Remove
    GM5569446Courtesy of GENERAL MOTORS COMPANY
  60. Transmission Fluid Cooler Inlet and Outlet Pipe (2) @Transmission Fluid Auxiliary Cooler - Remove and position aside
  61. Transmission Fluid Cooler Pipe Fitting Seal (3) - Remove and DISCARD
  62. Transmission Fluid Cooler Pipe Nut (1) - Remove
    GM5569448Courtesy of GENERAL MOTORS COMPANY
  63. Transmission Fluid Cooler Inlet and Outlet Pipe (1) @Transmission Fluid Auxiliary Cooler - Remove and position aside
    GM5569449Courtesy of GENERAL MOTORS COMPANY
  64. Transmission Fluid Cooler Pipe Fitting Seal (2) - Remove and DISCARD
  65. Transmission Fluid Cooler Pipe Clip (1) - Release
    GM5569584Courtesy of GENERAL MOTORS COMPANY
  66. Radiator Inlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5569581Courtesy of GENERAL MOTORS COMPANY
  67. Radiator Outlet Hose (2) @Engine Radiator - Remove
  68. Air Conditioning Compressor and Condenser Hose Nut (1) - Remove
    GM5569587Courtesy of GENERAL MOTORS COMPANY
  69. Air Conditioning Condenser and Evaporator Hose Nut (2) - Remove
  70. Air Conditioning Compressor and Condenser Hose (1) @Air Conditioning Condenser - Remove
    GM5569588Courtesy of GENERAL MOTORS COMPANY
  71. Air Conditioning Condenser and Evaporator Hose (3) @Air Conditioning Condenser - Remove
  72. Air Conditioning Compressor and Condenser Hose Seal (2) - Remove and DISCARD [2x]
  73. 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
  74. Plenum Front Panel Outer Reinforcement (1) - Remove - Plenum Front Panel Outer Reinforcement Removal and Installation
    GM5571687Courtesy of GENERAL MOTORS COMPANY
  75. 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.

  76. Accessory Drive Primary Belt (1) - Remove and DISCARD
  77. 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.

  78. Accessory Drive Auxiliary Belt (1) - Remove and DISCARD
  79. Battery Positive Cable Nut (1) - Remove
    GM5573641Courtesy of GENERAL MOTORS COMPANY
  80. Starter Solenoid Cable (2) - Remove
  81. Electrical Connector (3) - Disconnect
  82. Generator Bolt (1) - Remove [2x]
    GM5642527Courtesy of GENERAL MOTORS COMPANY
  83. Generator (1) - Remove
    GM5642615Courtesy of GENERAL MOTORS COMPANY
  84. Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type
    GM5587614Courtesy of GENERAL MOTORS COMPANY
  85. Heater Inlet Hose (2) @Water Pump - Remove
  86. Heater Water Auxiliary Pump Hose (3) @Water Pump - Remove
  87. Air Conditioning Compressor Bolt (1) - Remove
    GM5585694Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    It is not necessary to recover and recharge the refrigerant to perform this repair.

  88. Air Conditioning Compressor Nut (2) - Remove
  89. Air Conditioning Compressor Stud (3) - Remove
  90. Air Conditioning Compressor (1) - Position aside
    GM5585692Courtesy of GENERAL MOTORS COMPANY
  91. Radiator Outlet Hose Clamp (1) - Disengage - Hose Clamp Replacement Guidelines - Spring Type
    GM5587609Courtesy of GENERAL MOTORS COMPANY
  92. Radiator Outlet Hose (2) @Water Pump - Remove
  93. Hose Clamp (1) - Disengage [2x] - Hose Clamp Replacement Guidelines - Spring Type
    GM5587615Courtesy of GENERAL MOTORS COMPANY
  94. Engine Coolant Air Bleed Hose (2) @Water Pump - Remove
  95. Radiator Inlet Hose (3) @Water Pump - Remove
  96. Engine Coolant Temperature Sensor Electrical Connector (1) - Disconnect
    GM5587616Courtesy of GENERAL MOTORS COMPANY
  97. Water Pump Housing Bolt (1) - Remove [6x]
    GM4994474Courtesy of GENERAL MOTORS COMPANY
  98. Water Pump (1) - Remove
    GM5587617Courtesy of GENERAL MOTORS COMPANY
  99. Water Pump Gasket (2) - Remove and DISCARD [2x]
  100. Positive Crankcase Ventilation Tube Connector (1) @Positive Crankcase Ventilation Fitting - Disconnect - Plastic Collar Quick Connect Fitting Service
    GM5527888Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  101. Positive Crankcase Ventilation Tube Connector (2) @Intake Manifold - Disconnect - Plastic Collar Quick Connect Fitting Service
  102. Positive Crankcase Ventilation Foul Air Tube (3) - Remove
  103. 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
  104. Evaporative Emission Canister Purge Tube (2) @Evaporative Emission Canister Purge Solenoid Valve - Remove and position aside
  105. Remove the oil level indicator. (1)
    GM5535974Courtesy of GENERAL MOTORS COMPANY
  106. Grasp the valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (2) from the 3 valve rocker arm cover insulator retainers (1).
    GM5536408Courtesy of GENERAL MOTORS COMPANY
  107. Valve Rocker Arm Cover Insulator- Left Side (3) - Remove
  108. Inspect the 3 upper intake manifold sight shield grommets (2) on the valve rocker arm cover insulator and replace as necessary.
  109. Grasp the valve rocker arm cover insulator (3) and lift up disengaging the 3 upper intake manifold sight shield grommets (1) from the 3 valve rocker arm cover insulator retainers (2).
    GM5537681Courtesy of GENERAL MOTORS COMPANY
  110. Valve Rocker Arm Cover Insulator- Right Side (3) - Remove
  111. Inspect the 3 upper intake manifold sight shield grommets (1) on the valve rocker arm cover insulator (3) and replace as necessary.
  112. Engine Wiring Harness Connector (1) @Throttle Body - Disconnect
    GM5540971Courtesy of GENERAL MOTORS COMPANY
  113. Engine Wiring Harness Retainer (2) @Intake Manifold Cover - Remove [2x]
  114. Engine Wiring Harness Connector (3) @Manifold Absolute Pressure Sensor - Disconnect
  115. Engine Wiring Harness Connector (4) @Evaporative Emission Canister Purge Solenoid Valve - Disconnect
  116. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [4x]
    GM5540973Courtesy of GENERAL MOTORS COMPANY
  117. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [3x]
    GM5540974Courtesy of GENERAL MOTORS COMPANY
  118. 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.

  119. Move the intake manifold and intake manifold cover (2) forward enough to gain access to the rear engine wiring harness retainers.
  120. Engine Wiring Harness Retainer (1) @Intake Manifold Cover (2) - Remove [4x]
    GM5540975Courtesy of GENERAL MOTORS COMPANY
  121. 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.

  122. Cover the cylinder head passages in order to prevent dirt or debris from entering the passages.
  123. Intake Manifold Gasket (1) - Remove and DISCARD [8x]
    GM5541471Courtesy of GENERAL MOTORS COMPANY
  124. Oil Level Indicator Tube Bolt (1) - Remove
    GM5535975Courtesy of GENERAL MOTORS COMPANY
  125. 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.

  126. Valve Rocker Arm Oil Control Valve Extension Harness (1) @Valve Rocker Arm Oil Control Valve Harness - Disconnect
    GM5567747Courtesy of GENERAL MOTORS COMPANY
  127. Engine Wiring Harness Bolt (1) - Remove [2x]
    GM5581814Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  128. Wiring Harness Retainer (1) - Remove
    GM5581817Courtesy of GENERAL MOTORS COMPANY
  129. Engine Wiring Harness Bracket Bolt (1) - Remove
    GM5581818Courtesy of GENERAL MOTORS COMPANY
  130. Engine Wiring Harness - Reposition
    GM5581819Courtesy of GENERAL MOTORS COMPANY
  131. Engine Wiring Harness Connector (1) @Ignition Coil - Disconnect [8x]
  132. Fuel Feed Pipe (1) - Disconnect - Metal Collar Quick Connect Fitting Service
    GM5569054Courtesy of GENERAL MOTORS COMPANY
    WARNING:

    Refer to Diesel/Gasoline Vapors Warning .

  133. Fuel Feed Pipe (1) - Reposition
  134. Fuel Feed Pipe Bolt (1) - Remove
    GM5569057Courtesy of GENERAL MOTORS COMPANY
  135. Fuel Feed Pipe (2) - Disconnect - Metal Collar Quick Connect Fitting Service
  136. Fuel Feed Pipe (2) - Reposition
  137. Fuel Feed Intermediate Pipe Nut (1) @Fuel Feed Intermediate Pipe (2) - Loosen until disengaged [2x]
    GM5568606Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Fuel feed intermediate pipes will be delivered with shipping caps that are meant to protect the mating joint threads. Do NOT remove shipping caps until the pipe is to be installed and joints are to be secured. Failure to do so could result in damage to the mating threads.

    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (2). If the 2 fuel feed intermediate pipe nuts (1) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

  138. Fuel Feed Intermediate Pipe (2) - Remove and DISCARD
  139. Fuel Feed Intermediate Pipe Nut (1) - Loosen until disengaged [2x]
    GM5612992Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do NOT reuse the fuel feed intermediate pipe (3). If the 2 fuel feed intermediate pipe nuts (1) are loosened or the fuel feed intermediate pipes are removed, the fuel feed intermediate pipes MUST be replaced.

  140. Fuel Feed Pipe Bolt (2) - Remove
  141. Fuel Feed Intermediate Pipe (3) - Remove and DISCARD
  142. Disconnect and reposition the fuel pump and fuel injector wiring harness as necessary.
  143. Fuel Pump Bolt (1) - Remove [2x]
    GM5568498Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Alternately loosen the fuel pump bolts one turn at a time until the pump is fully disengaged from fuel pump lifter follower. Trying to remove the pump bolts without even side-to-side loosening may result in pump plunger damage

  144. Fuel Pump Cover (2) - Remove
  145. Fuel Pump Bolt Retainer (3) - Remove [2x]
  146. Fuel Pump (4) - Remove
  147. Fuel Pump Bracket Gasket (5) - Remove and DISCARD
  148. Front Wheelhouse Liner- Left Side and Right Side - Remove - Front Wheelhouse Liner Replacement
  149. Engine Oil and Oil Filter - Remove and DISCARD - Engine Oil and Oil Filter Replacement
  150. Front Bumper Fascia Skid Plate Bolt (1) - Remove [4x]
    GM5512320Courtesy of GENERAL MOTORS COMPANY
  151. Underbody Splash Shield Bolt (2) - Remove [4x]
  152. Underbody Splash Shield (1) - Remove
    GM5512311Courtesy of GENERAL MOTORS COMPANY
  153. Underbody Splash Shield Bolt (2) - Remove [2x]
    GM5512332Courtesy of GENERAL MOTORS COMPANY
  154. Underbody Skid Shield (3) - Remove
  155. Disconnect the heated oxygen sensor electrical connector.
    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).
  156. Using a suitable tool, remove the heated oxygen sensor (1).
  157. Exhaust Heat Shield Bolt- Left Side (1) - Remove
    GM5508824Courtesy of GENERAL MOTORS COMPANY
  158. Exhaust Front Pipe Heat Shield- Left Side (2) - Remove
  159. Exhaust Heat Shield Bolt- Right Side (1) - Remove
    GM5508826Courtesy of GENERAL MOTORS COMPANY
  160. Exhaust Front Pipe Heat Shield- Right Side (2) - Remove
  161. Disconnect the heated oxygen sensor electrical connector.
    GM5568855Courtesy of GENERAL MOTORS COMPANY
    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 oxygen sensor (1).
    • The heated oxygen sensor (1) MAY be difficult to remove when the engine temperature is less than 48°C (120°F).
  162. Using a suitable tool, remove the heated oxygen sensor (1).
  163. 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.

  164. 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.

  165. Exhaust System Seal (1) - Remove and DISCARD
    GM5001105Courtesy of GENERAL MOTORS COMPANY
  166. Exhaust System Seal (1) - Remove and DISCARD
    GM5001113Courtesy of GENERAL MOTORS COMPANY
  167. CAUTION:

    With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of the steering column will prevent damage and a possible malfunction of the SIR system. The steering wheel must be secured in position before disconnecting the following components:

    • The steering column
    • The intermediate shaft(s)
    • The steering gear

    After disconnecting these components, do not rotate the steering wheel or move the front tires and wheels. Failure to follow this procedure may cause the SIR coil assembly to become un-centered and cause possible damage to the SIR coil. If you think the SIR coil has became un-centered, refer to your specific SIR coil's centering procedure to re-center SIR Coil.

  168. Secure the steering wheel so it will not turn when the upper intermediate steering shaft and steering column are disconnected.
  169. Mid Intermediate Steering Shaft Bolt (1) - Remove
    GM5002170Courtesy of GENERAL MOTORS COMPANY
  170. Upper Intermediate Steering Shaft (1) @Intermediate Steering Shaft - Separate
    GM5002171Courtesy of GENERAL MOTORS COMPANY
  171. Twist the 4 spark plug wire boots a 1/2 turn and remove the spark plug wires (1) from the gas engine ignition spark plugs (2).
    GM5541819Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Pull only on the spark plug wire boot to remove the spark plug wire (1).

  172. Remove the 3 left side exhaust manifold heat shield bolts (1) through the wheel opening.
    GM5647219Courtesy of GENERAL MOTORS COMPANY
  173. Exhaust Manifold Heat Shield- Left Side (1) - Remove
    GM5647218Courtesy of GENERAL MOTORS COMPANY
  174. Exhaust Manifold Bolt- Left Side (1) - Remove and DISCARD [5x]
    GM5647175Courtesy of GENERAL MOTORS COMPANY
  175. Exhaust Manifold- Left Side (1) - Remove
    GM5647178Courtesy of GENERAL MOTORS COMPANY
  176. Exhaust Manifold Gasket- Left Side (2) - Remove and DISCARD
  177. Exhaust Manifold Heat Shield Bolt- Right Side (1) - Remove [3x]
    GM4992215Courtesy of GENERAL MOTORS COMPANY
  178. Twist the 4 spark plug wire boots 1/2 turn and remove the 4 spark plug wires (1) from the 4 gas engine ignition spark plugs (2).
    GM5541819Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Pull only on the spark plug wire boot to remove the spark plug wire (1).

  179. Remove the right exhaust manifold heat shield (1) through the wheel opening.
    GM4992288Courtesy of GENERAL MOTORS COMPANY
  180. Exhaust Manifold Bolt- Right Side (1) - Remove and DISCARD [5x]
    GM4992369Courtesy of GENERAL MOTORS COMPANY
  181. Remove the right side exhaust manifold (1) through the wheel opening.
    GM4992392Courtesy of GENERAL MOTORS COMPANY
  182. Exhaust Manifold Gasket- Right Side (2) - Remove and DISCARD
  183. Valve Rocker Arm Cover Bolt- Left Side (1) - Loosen until disengaged [9x]
    GM5549496Courtesy of GENERAL MOTORS COMPANY
  184. Valve Rocker Arm Cover- Left Side (2) - Remove
  185. Valve Rocker Arm Cover Gasket- Left Side (2) @Valve Rocker Arm Cover (1) - Remove and DISCARD
    GM5549498Courtesy of GENERAL MOTORS COMPANY
  186. Valve Rocker Arm Pivot Support Bolt (2) - Loosen until disengaged [8x]
    GM5569335Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Only replace the valve rocker arms (1) and valve push rods as required.
    • The rocker arm pivot support bolts are not serviced separately.
    • Place the valve rocker arms (1) and valve push rods in a rack so they can be installed in the same location from which they were removed.
  187. Valve Rocker Arm (1) - Remove [8x]
  188. Valve Push Rod- Left Side (1) - Remove [8x]
    GM5569419Courtesy of GENERAL MOTORS COMPANY
  189. Engine Wiring Harness Ground Bolt (1) - Remove
    GM5582297Courtesy of GENERAL MOTORS COMPANY
  190. Engine Wiring Harness (2) - Remove
  191. Cylinder Head Bolt M12 x 102 (1) - Remove and DISCARD
    GM5582379Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The forward most fastener on the Left Side Cylinder Head is unique to all other cylinder head fasteners. It is shorter, has an internal hex drive and has a lower final tightening torque angle.

  192. Cylinder Head Bolt M12 x 134 (2) - Remove and DISCARD [9x]
  193. Cylinder Head (2) - Remove
    GM5582380Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    After removal, place the cylinder head on 2 wood blocks in order to prevent damage to the sealing surfaces.

  194. Cylinder Head Gasket (1) - Remove and DISCARD
  195. Heater Hose Clip Bracket Bolt (1) - Remove
    GM5549959Courtesy of GENERAL MOTORS COMPANY
  196. Heater Inlet and Outlet Hose Bracket (2) - Reposition
  197. Retainer Clip (1) @Cylinder Head - Right Side (2) - Remove
    GM5584902Courtesy of GENERAL MOTORS COMPANY
  198. Valve Rocker Arm Cover Bolt (1) - Loosen until disengaged [10x]
    GM5549960Courtesy of GENERAL MOTORS COMPANY
  199. Valve Rocker Arm Cover- Right Side (2) - Remove
  200. Valve Rocker Arm Cover Gasket- Right Side (2) @Valve Rocker Arm Cover (1) - Remove and DISCARD
    GM5549964Courtesy of GENERAL MOTORS COMPANY
  201. Valve Rocker Arm Pivot Support Bolt (1) - Loosen until disengaged [8x]
    GM5569716Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Only replace the valve rocker arms (1) and valve push rods as required.
    • The rocker arm pivot support bolts are not serviced separately.
    • Place the valve rocker arms (1) and valve push rods in a rack so they can be installed in the same location from which they were removed.
  202. Valve Rocker Arm (2) - Remove [8x]
  203. Valve Push Rod- Right Side (1) - Remove [8x]
    GM5569717Courtesy of GENERAL MOTORS COMPANY
  204. Engine Wiring Harness Ground Bolt (1) - Remove
    GM5584907Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  205. Engine Wiring Harness (2) - Reposition
  206. Cylinder Head Bolt (1) - Remove and DISCARD [10x]
    GM5584908Courtesy of GENERAL MOTORS COMPANY
  207. Cylinder Head (1) - Remove
    GM5584910Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    After removal, place the cylinder head on 2 wood blocks in order to prevent damage to the sealing surfaces.

  208. Cylinder Head Gasket (2) - Remove and DISCARD
  209. Engine Block Valley Cover Bolt (2) - Loosen until disengaged [9x]
    GM5567748Courtesy of GENERAL MOTORS COMPANY
  210. Engine Block Valley Cover (1) - Remove
  211. Engine Block Valley Cover Gasket (2) @Engine Block Valley Cover (1) - Remove and DISCARD
    GM5567750Courtesy of GENERAL MOTORS COMPANY
  212. Wiring Harness Connector Seal (1) @Valve Rocker Arm Oil Control Valve Harness (2) - Remove and DISCARD
    GM5567753Courtesy of GENERAL MOTORS COMPANY
  213. Valve Lifter Follower Guide Bolt (1) - Remove
    GM5567786Courtesy of GENERAL MOTORS COMPANY
  214. Valve Lifter Follower Guide (2) - Remove
  215. Valve Lifter Follower (3) - Remove
  216. Valve Lifter Guide Bolt- Left Side (1) - Remove (2)
    GM5587687Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Organize and mark the valve lifters (3), valve lifter guides (2), so they can be installed to their original location.
    • Only replace the valve lifters (3) and valve lifter guides (2) as required.
  217. NOTE:

    Note the installed position of the valve lifter guides (2). The notched area of the valve lifter guides (2) align with the locating tab on the engine block.

  218. Remove the valve lifter guide (2) and the valve lifters (3) as an assembly.
  219. Valve Lifter- Left Side (1) @Valve Lifter Guide (2) - Remove
    GM5587689Courtesy of GENERAL MOTORS COMPANY
  220. Valve Lifter Guide Bolt- Right Side (3) - Remove (2)
    GM5588248Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Organize and mark the valve lifters (3), valve lifter guides (2), so they can be installed to their original location.
    • Only replace the valve lifters and valve lifter guides as required.
  221. NOTE:

    Note the installed position of the valve lifter guides (2). The notched area of the valve lifter guides (2) align with the locating tab on the engine block.

  222. Remove the valve lifter guide (2) and the valve lifters (1) as an assembly.
  223. Valve Lifter- Right Side (1) @Valve Lifter Guide (2) - Remove
    GM5587689Courtesy of GENERAL MOTORS COMPANY
  224. Front Stabilizer Shaft Bolt (1) - Remove [4x]
    GM5591026Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Support the front stabilizer shaft.

  225. Front Stabilizer Shaft Clamp (2) - Remove [2x]
  226. Front Stabilizer Shaft (3) - Remove
  227. Electrical Connector@Heater Coolant Pump (2) - Disconnect
    GM5620579Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Some components not shown for graphic clarity.

  228. Heater Water Auxiliary Pump Bolt (1) - Remove
  229. Remove the heater coolant pump and heater water auxiliary pump bracket (2) as assembly and position aside.
  230. Drivetrain and Front Suspension Frame Reinforcement Nut (1) - Remove [4x]
    GM5651694Courtesy of GENERAL MOTORS COMPANY
  231. Drivetrain and Front Suspension Frame Reinforcement Bolt (2) - Remove [4x]
  232. Drivetrain and Front Suspension Frame Front Crossmember (1) - Remove
    GM5651698Courtesy of GENERAL MOTORS COMPANY
  233. Disconnect harness connector and retainers as necessary.
  234. Torque Converter Cover Bolt- Left Side (1) - Remove
    GM5585541Courtesy of GENERAL MOTORS COMPANY
  235. Torque Converter Cover- Left Side (2) - Remove
  236. Engine Oil Cooler Hose Bracket Nut (1) - Remove
    GM4997286Courtesy of GENERAL MOTORS COMPANY
  237. Engine Oil Pressure Sensor Sleeve (1) - Remove
    GM4997823Courtesy of GENERAL MOTORS COMPANY
  238. Electrical Connector (1) @Engine Oil Pressure Sensor - Disconnect
    GM5582300Courtesy of GENERAL MOTORS COMPANY
  239. Wiring Harness Retainer (2) @Engine Oil Cooler Hose - Remove
  240. Engine Oil Cooler Adapter Bolt (1) - Remove [2x]
    GM5582326Courtesy of GENERAL MOTORS COMPANY
  241. Engine Oil Cooler Hose (1) @Oil Pan - Reposition
    GM5582330Courtesy of GENERAL MOTORS COMPANY
  242. Engine Oil Cooler Gasket (2) - Remove and DISCARD
  243. Electrical Connector@Knock Sensor (4) - Disconnect
    GM5538525Courtesy of GENERAL MOTORS COMPANY
  244. Remove the transmission fluid auxiliary cooler pipe bracket nut (1) from the oil pan.
    GM5504569Courtesy of GENERAL MOTORS COMPANY
  245. Engine Wiring Harness Retainer (2) - Remove
    GM5644061Courtesy of GENERAL MOTORS COMPANY
  246. Engine Wiring Harness Ground Stud (1) - Remove [2x]
  247. Engine Wiring Harness (3) @Oil Pan - Reposition
  248. Engine Wiring Harness Retainer (1) @Oil Level Indicator Tube (2) - Disconnect
    GM5535977Courtesy of GENERAL MOTORS COMPANY
  249. Disconnect the wiring harness connectors and retainers as necessary.
  250. Transmission Fluid Cooler Pipe Clip Bolt (1) @Oil Pan - Remove
    GM5644122Courtesy of GENERAL MOTORS COMPANY
  251. NOTE:

    Components removed in graphic to better illustrate service parts.

  252. Transmission Fluid Cooler Pipe Clip Bracket (2) @Oil Pan - Remove
  253. Reposition the transmission cooler inlet and outlet pipe (1) as necessary.
    GM5608335Courtesy of GENERAL MOTORS COMPANY
  254. Oil Level Indicator Tube (1) @Oil Pan - Remove
    GM5535978Courtesy of GENERAL MOTORS COMPANY
  255. Oil Level Indicator Seal (2) - Remove and DISCARD
  256. Oil Level Indicator Tube (1) - Reposition
  257. Starter Heat Shield Bolt (1) - Remove [2x]
    GM5569719Courtesy of GENERAL MOTORS COMPANY
  258. Starter Heat Shield Bolt (1) - Remove
    GM5569721Courtesy of GENERAL MOTORS COMPANY
  259. Starter Heat Shield (2) - Remove
  260. Battery Negative Cable Ground Bolt (1) - Remove
    GM5569769Courtesy of GENERAL MOTORS COMPANY
  261. Starter Solenoid Cable (2) - Reposition away
  262. Starter Bolt (1) - Remove [2x]
    GM5569758Courtesy of GENERAL MOTORS COMPANY
  263. Reposition the starter (2) to access the electrical connections.
  264. Protective Sleeve (4) - Reposition
    GM5569840Courtesy of GENERAL MOTORS COMPANY
  265. Starter Solenoid Cable Nut (2) - Remove
  266. Starter Solenoid Cable (1) - Remove
  267. Electrical Connector (3) - Disconnect
  268. Starter (1) - Remove
    GM5569910Courtesy of GENERAL MOTORS COMPANY
  269. Torque Converter Cover Bolt- Right Side (1) - Remove
    GM5585543Courtesy of GENERAL MOTORS COMPANY
  270. Torque Converter Cover- Right Side (2) - Remove
  271. Position the EN-42386  Flywheel Holding Tool (1) into place.
    GM5591309Courtesy of GENERAL MOTORS COMPANY
  272. Install the M10-1.5 x 120mm (3) and the M10-1.5 x 45mm (2) bolts and tighten to 50 N.m (37 lb ft).
  273. Transmission Bolt (1) - Remove [2x]
    GM5760502Courtesy of GENERAL MOTORS COMPANY
  274. Electrical Connector (1) - Disconnect
    GM5589667Courtesy of GENERAL MOTORS COMPANY
  275. Oil Pan Bolt (2, 3) - Remove [16x]
    GM5569924Courtesy of GENERAL MOTORS COMPANY
  276. Oil Pan (1) - Remove
  277. Oil Pan High Pressure Port Seal (2) - Remove and DISCARD [2x]
    GM5577670Courtesy of GENERAL MOTORS COMPANY
  278. Oil Pan Front Seal (3) - Remove and DISCARD
  279. Crankshaft Balancer Bolt (1) - Remove and DISCARD
    GM5644180Courtesy of GENERAL MOTORS COMPANY
  280. Install the EN-41816-A  Crankshaft Balancer Remover (1) and the EN-44226-5  Crankshaft Protector (3) crankshaft balancer (2).
    GM5586268Courtesy of GENERAL MOTORS COMPANY
  281. Using the EN-41816-A  Crankshaft Balancer Remover (1) and the EN-44226-5  Crankshaft Protector (2) remove the crankshaft balancer (3) from the crankshaft.
    GM5586937Courtesy of GENERAL MOTORS COMPANY
  282. Remove the EN-41816-A  Crankshaft Balancer Remover (1) and the EN-44226-5  Crankshaft Protector (2) from the crankshaft balancer (3).
    1. Install the EN-51096  Seal Remover (2) to the GE-23907-1  Slide Hammer with Shaft (1).
      GM5606803Courtesy of GENERAL MOTORS COMPANY
    2. NOTE:

      EN-51096  Crankshaft Seal Remover (2) has two ends. The end with the larger bend will be used to remove the crankshaft front oil seal (3).

    3. Slide the large bend of the EN-51096  Seal Remover (2) between the lip of the crankshaft front oil seal and crankshaft. Ensure that the larger bend of the EN-51096  Crankshaft Seal Remover (2) engages the rear side of the crankshaft front oil seal (3).
    4. Using the EN-51096  Seal Remover (2) and the GE-23907-1  Slide Hammer with Shaft (1) remove the crankshaft front oil seal (3).
    5. Crankshaft Front Oil Seal (1) - Remove and DISCARD
      GM5606801Courtesy of GENERAL MOTORS COMPANY
  283. Engine Front Cover Bolt (1, 3) - Remove [10x]
    GM5615528Courtesy of GENERAL MOTORS COMPANY
  284. Engine Front Cover (2) - Remove
  285. Oil Pump Bolt (1) - Remove [4x]
    GM5617530Courtesy of GENERAL MOTORS COMPANY
  286. Oil Pump (1) - Remove
    GM5617529Courtesy of GENERAL MOTORS COMPANY
  287. Inspect the seal (3) of the timing chain tensioner for damage and wear. If damaged or worn replace the timing chain tensioner.
    GM5608752Courtesy of GENERAL MOTORS COMPANY
  288. Compress the tensioner blade and install the EN-46330  Timing Belt Tensioner Retaining Pin (1) into the timing chain tensioner (2).
  289. Camshaft Position Actuator Solenoid Valve (1) - Remove and DISCARD
    GM5608754Courtesy of GENERAL MOTORS COMPANY
  290. Loosen and separate the camshaft position actuator (3) and timing chain (1) from the camshaft as an assembly. Position fingers behind the actuator sprocket (2) and pull the actuator (3) and sprocket (2) away from the front of the camshaft. Never pull on the reluctor wheel (3) when attempting to remove the actuator.
    GM5608758Courtesy of GENERAL MOTORS COMPANY
  291. Remove the camshaft position actuator sprocket (2) and timing chain (1) as an assembly.
  292. Insert a tie strap through the center of the actuator (3) and over the reluctor wheel to hold it together.
  293. Timing Chain Tensioner Bolt (1) - Remove [2x]
    GM5608777Courtesy of GENERAL MOTORS COMPANY
  294. Timing Chain Tensioner (2) - Remove
  295. Crankshaft Sprocket (1) @Crankshaft - Remove
    GM5608780Courtesy of GENERAL MOTORS COMPANY
  296. Camshaft Retainer Bolt (2) - Remove [4x]
    GM5621027Courtesy of GENERAL MOTORS COMPANY
  297. Camshaft Retainer (1) - Remove
  298. Camshaft (1) - Remove
    GM5621025Courtesy of GENERAL MOTORS COMPANY
  299. Using the appropriate tool, clean and prepare the applicable sealing surface.