H3 2006

Alternator

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Removal & Installation



3.5L & 3.7L Engines

Specific to:

Hummer H3 2006-2010

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the drive belt.
  4.  
  5. Raise and support the vehicle only high enough to access the Air Conditioning (A/C) compressor through the wheelhouse.
  6.  
  7. Remove the left front wheel.
  8.  
  9. Remove the left wheelhouse liner.
  10.  
  11. Disengage the A/C compressor electrical connector from the bracket.
  12.  
  13. Recover the A/C system.
  14.  
  15. Disconnect the A/C condenser and evaporator lines from the compressor.
  16.  
  17. Remove the A/C compressor mounting bolts ONLY.
    NOTE
    The upper mounting bolt will remain with the A/C compressor.



    Click image to see an enlarged view

    Fig. Remove the A/C compressor (1) mounting bolts (2, 3)

  18.  
  19. Lower the vehicle.
  20.  
  21. Reposition the protective boot from the alternator output BAT terminal.
  22.  
  23. Remove the alternator output BAT terminal nut and remove the alternator lead from the alternator.

    Click image to see an enlarged view

    Fig. Remove the alternator output BAT terminal nut and remove the alternator lead from the alternator

  24.  
  25. Disconnect the alternator electrical connector.
  26.  
  27. Remove the 3 alternator bolts.

    Click image to see an enlarged view

    Fig. Remove the 3 alternator bolts

  28.  
  29. Position the A/C compressor forward, in order to gain clearance to remove the alternator.
  30.  
  31. Remove the alternator.
  32.  

To install:

  1. Position the alternator to the engine.
  2.  
  3. Install the 3 alternator bolts. Tighten the bolts in sequence to 37 ft. lbs. (50 Nm).
  4.  
  5. Install the alternator lead to the alternator and install the alternator output BAT terminal nut. Tighten the nut to 15 ft. lbs. (20 Nm).
  6.  
  7. Position the protective boot onto the alternator output BAT terminal.
  8.  
  9. Connect the alternator electrical connector.
  10.  
  11. Raise and support the vehicle only high enough to access the A/C compressor through the wheelhouse.
  12.  
  13. Position the A/C compressor to the engine.
  14.  
  15. Install the A/C compressor mounting bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  16.  
  17. Connect the condenser and evaporator lines to the compressor.
  18.  
  19. Attach the A/C compressor electrical connector to the bracket.
  20.  
  21. Install the left wheelhouse liner.
  22.  
  23. Install the left front wheel.
  24.  
  25. Lower the vehicle.
  26.  
  27. Install the drive belt.
  28.  
  29. Connect the negative battery cable.
  30.  
  31. Charge the A/C system.
  32.  

5.3L Engine

Specific to:

Hummer H3 2006-2010

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the intake manifold cover.
  4.  
  5. Remove the accessory drive belt.
  6.  
  7. Disconnect the engine wiring harness electrical connector from the alternator.

    Click image to see an enlarged view

    Fig. Disconnect the engine wiring harness electrical connector from the alternator

  8.  
  9. Reposition the engine wiring harness/positive battery cable boot.
  10.  
  11. Remove the engine wiring harness/positive battery cable nut from the alternator.
  12.  
  13. Remove the engine wiring harness/positive battery cable from the alternator.
  14.  
  15. Remove the alternator bolts.

    Click image to see an enlarged view

    Fig. Remove the alternator bolts

  16.  
  17. Remove the alternator.
  18.  

To install:

  1. Install the alternator.
  2.  
  3. Install the alternator bolts. Tighten the bolts to 37 ft. lbs. (50 Nm).
  4.  
  5. Install the engine wiring harness/positive battery cable to the alternator.
  6.  
  7. Install the engine wiring harness/positive battery cable nut to the alternator.
  8.  
  9. Position the engine wiring harness/positive battery cable boot.
  10.  
  11. Connect the engine wiring harness electrical connector to the alternator.
  12.  
  13. Install the accessory drive belt.
  14.  
  15. Install the intake manifold cover.
  16.  
  17. Connect the negative battery cable.
  18.  

 
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