Escalade, Suburban 1500 & 2500, Tahoe, Yukon, Yukon XL 1500 & 2500 (2006-2007), Yukon Denali and Yukon Denali XL (2005-2006)

Engine

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Removal & Installation



4.8L, 5.3L, 6.0L & 6.2L Engines

CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures.

  1. Remove or disconnect the following:

    Negative battery cable
     
    Coolant
     
    A/C refrigerant
     

  2.  
  3. Raise the hood to the servicing position. Move the hood hinge bolt to hold the hood in the servicing position.
    CAUTION
    In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle. In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine.



    Upper and the lower radiator hoses from the engine
     
    Air cleaner duct from the engine
     
    A/C condenser mounting bolts
     
    Radiator support from the vehicle
     
    A/C compressor
     
    Coolant hose from the throttle body
     
    Heater hoses from the engine and the cowl
     
    Engine sight shield from the intake manifold
     
    Accelerator control cable mounting bracket from the intake manifold
     



    Accelerator control cable and the cruise control cable, if equipped, from the throttle shaft
     

  4.  
  5. Open the large electrical harness retainer. Remove one 10 mm nut in order to release the engine harness from the intake manifold.
  6.  
  7. Disconnect the electrical connectors from the following:

    Eight injectors
     
    Idle Air Control (IAC) motor
     
    Throttle Position (TP) sensor
     
    Evaporative Emissions (EVAP) canister purge solenoid
     
    Manifold Absolute Pressure (MAP) sensor
     
    Camshaft Position (CMP) sensor

    Click image to see an enlarged view

    Fig. Ignition coil removal-4.8L, 5.3L, 6.0L and 6.2L engines

     



    Ground splice at the rear of the right side of the block
     
    Ground splice and the ground strap at the rear of the left side of the block
     
    Coolant Temperature (CTS) sensor
     
    Oil pressure sensor/switch
     
    Electrical connector from intake and disconnect from harness
     
    Junction block bracket from alternator bracket

    Click image to see an enlarged view

    Fig. Power steering pump removal-4.8L, 5.3L, 6.0L and 6.2L engines

     

  8.  
  9. Set the electrical harness aside.
  10.  
  11. Remove or disconnect the following:

    EVAP canister purge solenoid vent tube from the solenoid by squeezing the retainer, then release the tube from the solenoid
     
    Battery negative cable from the engine block
     
    Drive belt
     
    Bolts holding the alternator mounting bracket to the cylinder head and block
     
    Bolt behind the power steering pump to engine block

    Click image to see an enlarged view

    Fig. Power steering mount bracket removal-4.8L, 5.3L, 6.0L and 6.2L engines

     



    Alternator mounting bracket. Position the bracket aside.
     
    Fuel pipes from the engine
     

  12.  
  13. Raise the vehicle.

    Steering linkage under body shield, if equipped
     
    Engine oil pan under body shield, if equipped
     
    Engine oil
     
    Starter motor

    Click image to see an enlarged view

    Fig. Bell housing bolt removal-4.8L, 5.3L, 6.0L and 6.2L engines

     

  14.  
  15. Disconnect the engine wiring harness from the following components:

    Crankshaft Position (CKP) sensor
     
    Engine oil level sensor
     
    Block heater, if equipped
     
    Oil pan wiring harness
     

  16.  
  17. Reposition wiring from the lower engine area.

    Exhaust pipes from the exhaust manifolds
     
    Transmission cooler pipe retainer from the right side of the engine block, if equipped
     
    Torque converter shield from the engine
     
    Torque converter bolts
     
    Nut and the transmission oil level indicator tube from the bell housing stud
     
    Lower bell housing studs from the engine
     

  18.  
  19. Lower the vehicle.

    Remaining bell housing bolts
     
    Engine electrical harness aside
     
    Ignition coil(s)
     

  20.  
  21. Install an engine crane.
  22.  
  23. Install a floor jack or stands to transmission for support.
  24.  
  25. Remove the engine mount bolts.
    NOTE
    Use care while moving the engine assembly in order to avoid breaking the MAP sensor locating tabs. Broken MAP sensor tabs may result in decreased engine performance.

  26.  
  27. Remove the engine from the vehicle.

    Click image to see an enlarged view

    Fig. Engine mount disconnect-4.8L, 5.3L, 6.0L and 6.2L engines

  28.  

To install:

  1. Install or connect the following:

    Engine to the vehicle
     
    Engine mount bolts
     
    Upper bell housing bolts
     

  2.  
  3. Remove transmission support apparatus.
  4.  
  5. Remove the lifting device.
  6.  
  7. Remove the lift brackets from both cylinder heads.
  8.  
  9. Install the ignition coil(s) and the spark plug wire(s).
  10.  
  11. Route the engine wiring harness to the lower right hand side of the engine.
  12.  
  13. Raise the vehicle.
  14.  
  15. Install or connect the following:

    Remaining bell housing bolts
     
    Torque converter bolts
     
    Torque converter shield
     
    Transmission oil level indicator tube and nut to bell housing stud
     
    A/C compressor
     
    Transmission cooler pipe retainer to right side of engine block
     
    Engine exhaust pipes to the exhaust manifolds
     

  16.  
  17. Reroute wiring to lower engine area and install bolt to oil pan.
  18.  
  19. Connect electrical connectors to the CKP sensor, the engine oil level sensor and the block heater, if equipped.
  20.  
  21. Install or connect the following:

    Starter motor
     
    Engine oil pan under body shield, if equipped
     
    Steering linkage under body shield
     

  22.  
  23. Lower the vehicle.

    Fuel pipes to the engine
     
    Alternator mounting bracket to the cylinder head using the nuts and the bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
     
    Bolt at the rear of the power steering pump to the engine block and tighten to 37 ft. lbs. (50 Nm)
     
    Alternator
     
    Drive belt
     
    Battery negative cable to the engine block
     
    EVAP canister purge solenoid to the intake manifold
     

  24.  
  25. Route the engine harness over the top of the engine. Attach the connectors for following components:

    Eight injectors
     
    IAC motor
     
    TP sensor
     
    EVAP canister purge solenoid.
     
    MAP sensor
     
    CMP sensor
     
    Ground splice at the rear of the right side of engine block
     
    Ground splice and the ground strap at the rear of the left side of engine block
     
    CTS sensor
     

  26.  
  27. Install or connect the following:
    CAUTION
    In order to avoid possible injury or vehicle damage, always replace the accelerator control cable with a NEW cable whenever you remove the engine from the vehicle. In order to avoid cruise control cable damage, position the cable out of the way while you remove or install the engine.



    Nut to the engine wiring harness bracket and tighten to 89 inch lbs. (10 Nm)
     



    NEW accelerator control cable
     
    Cruise control cable, if equipped, to the throttle shaft
     
    Bolts for the accelerator control cable mounting bracket and tighten to 89 inch lbs. (10 Nm)
     
    Engine sight shield to the intake manifold
     
    Heater hoses to the cowl and the engine
     
    Coolant hose to the throttle body
     
    Radiator support in the vehicle
     
    A/C condenser mounting bolts
     
    Air cleaner duct
     
    Lower radiator hoses to the engine
     

  28.  
  29. Lower the hood.
  30.  
  31. Fill the engine with oil.
  32.  
  33. Fill the engine with coolant.
  34.  
  35. Connect the negative battery cable.
  36.  


CAUTION
Before servicing any electrical component, the ignition key must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures.

  1. Remove or disconnect the following:

    Negative battery cable
     
    Coolant
     
    Engine oil
     
    A/C refrigerant
     

  2.  
  3. Raise the hood to the servicing position. Move the hood hinge bolt to hold the hood in the servicing position.

    Hood latch and radiator support
     
    Intake manifold
     
    Upper and the lower radiator hoses from the engine
     
    Heater hoses from the engine and the cowl
     
    Harness connectors from the oil pressure sensor and lifter oil manifold
     
    Ground strap from the left cylinder head
     
    Negative battery cable and harness ground from the right cylinder head
     

  4.  
  5. Raise and safely support the vehicle.

    Harness grounds and clips from the engine block
     
    Transmission oil cooler line clip bolt form the oil pan
     
    Starter
     
    Harness connectors for the knock sensors, CMP sensor, A/C pressure sensor, CKP sensor and oil level sensor
     
    Block heater connector, if equipped
     

  6.  
  7. Lower the vehicle.

    Power steering pump engine block bolt
     
    Alternator bracket assembly and set aside with the power steering pump
     
    Ignition coils to allow attachment of the engine lift brackets
     
    Transmission dipstick tube nut and tube
     

  8.  
  9. Install engine lift brackets J41798 or equivalent. Tighten the M8 bolts to 18 ft. lbs. (25 Nm) and the M10 bolts to 37 ft. lbs. (50 Nm).

    Engine mount bolts
     

  10.  
  11. Raise and safely support the vehicle.

    Engine shield or skid plate
     
    Exhaust pipes from the exhaust manifolds and catalytic converters
     
    Torque converter bolts
     
    Transmission mounting bolts
     

  12.  
  13. Lower the vehicle.
  14.  
  15. Install an engine crane.
  16.  
  17. Install a floor jack or stands to transmission for support.
  18.  
  19. Remove the engine from the vehicle.
  20.  

To install:

  1. Position the engine in the vehicle. Make sure the engine is properly aligned and mated with the transmission, then remove the crane.
  2.  
  3. Install the engine mount bolts; start with the middle bolt then the outer bolts. Tighten to 48 ft. lbs. (65 Nm).
  4.  
  5. Install the transmission bolts. Tighten to 37 ft. lbs. (50 Nm).
  6.  
  7. Align the torque converter bolt holes and install the bolts. Tighten to 47 ft. lbs. (63 Nm) except on 4L80E transmissions. On the 4L80E, tighten the bolts to 44 ft. lbs. (60 Nm).
  8.  
  9. The remaining installation is the reverse of removal.
  10.  

8.1L Engine
  1. Raise the hood to the servicing position. Move the hood hinge bolt to hold the hood in the servicing position.
  2.  
  3. Release the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Negative, then positive battery cables
     
    Coolant
     
    A/C refrigerant
     
    Engine oil cooler lines from the engine block
     
    Transmission-to-engine bolts
     
    Clutch pressure plate bolts, if equipped
     
    Torque converter bolts, if equipped
     
    Catalytic converter
     
    Exhaust manifold pipe
     
    Hoses from power steering pump, then plug the lines and ports
     
    Starter motor
     




  6.  
  7. Raise the vehicle.

    Engine electrical harness and tie aside
     
    Alternator
     
    Ground cable bolt from engine block
     
    Exhaust Gas Recirculation (EGR) valve adapter
     
    Vacuum lines (tag before removal)
     
    Throttle Actuator Control (TAC) module electrical connector
     

  8.  
  9. Install Engine Lift Brackets part No. J 36857, or equivalent, to the rear of the right cylinder head and the front of the left cylinder head.

    Click image to see an enlarged view

    Fig. Install suitable lift brackets to the rear of the right head and the front of the left head

  10.  
  11. Install the attaching bolt and washer. Use part No. 9428217 with 1560963. Tighten the bolts to 30 ft. lbs. (40 Nm).
  12.  
  13. Remove or disconnect the following:

    Engine mount heat shield bolt and shields
     
    Engine mount-to-engine mount bracket bolts
     
    Engine from the vehicle, using a suitable lifting device. Place on a suitable stand.
     
    A/C compressor/power steering pump bracket from the cylinder head
     
    Lift brackets from the cylinder head
     

  14.  

To install:

  1. Install Engine Lift Brackets part No. J 36857, or equivalent, to the rear of the right cylinder head and the front of the left cylinder head.
  2.  
  3. Install the attaching bolt and washer. Use part No. 9428217 with 1560963. Tighten the bolts to 30 ft. lbs. (40 Nm).
  4.  
  5. Install or connect the following:

    A/C compressor/power steering mounting bracket. Tighten the bolts and nut to 37 ft. lbs. (50 Nm).
     
    Alternator bracket
     
    Engine into the vehicle
     
    Engine mount-to-engine mount bracket bolts
     
    Engine mount heat shield and bolts
     

  6.  
  7. Remove the lift hooks from the cylinder heads, then raise the vehicle.

    Engine oil cooler lines
     
    Transmission-to-engine bolts
     
    Clutch pressure plate bolts, if equipped
     
    Torque converter bolts, if equipped
     
    Catalytic converter
     
    Exhaust manifold pipe
     
    Hoses to the power steering pump
     
    Starter motor
     

  8.  
  9. Lower the vehicle.

    Engine electrical harness. Make sure the harness is properly routed.
     
    Alternator
     
    Ground cable bolt to engine block and tighten to 12 ft. lbs. (16 Nm)
     
    EGR valve adapter
     
    Vacuum lines, as tagged during removal
     
    TAC module electrical connector
     
    Radiator
     
    A/C compressor
     
    Fuel feed and return lines
     
    Ignition coils
     
    Positive, then negative battery cables
     
    Air cleaner outlet duct and secure with the clamp
     

  10.  
  11. Lower the hood from the service position.
  12.  
  13. Properly recharge the A/C system.
  14.  
  15. Fill the engine with oil.
  16.  
  17. Fill the engine with coolant.
  18.  
  19. Perform the Crankshaft Position (CKP) sensor variation learn procedure:
    1. Install a suitable scan tool and check for Diagnostic Trouble Codes (DTCs). If any DTCs, other than P1336 are set, resolve those codes first, before proceeding with this procedure.
    2.  
    3. With the scan tool, select the crankshaft position variation learn procedure.
    4.  
    5. Observe the fuel cut-off for the 8.1L engine.
    6.  
    7. The scan tool will instruct you to perform certain steps, make sure you follow all directions given by the scan tool exactly.
    8.  
    9. Enable the crankshaft position system variation learn procedure.
      NOTE
      While the learn procedure is in progress, release the throttle immediately when the engine started to decelerate. The engine control is returned to the operator and the engine responds to throttle position after the learn procedure is complete.

    10.  
    11. Slowly increase the engine speed to the RPM that you observed.
    12.  
    13. Immediately release the throttle when fuel cut-out is reached.
    14.  
    15. The scan tool displays: Learn Status: Learned this ignition. If the scan tool does NOT display this message and not other DTCs set, you must perform further troubleshooting.
    16.  
    17. Turn the ignition OFF for 30 seconds after the learn procedure has been completed successfully.
    18.  

  20.  
  21. Start and run the engine, then check for leaks.
  22.  

 
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