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Home >> GMC >> 2007 >> Sierra Classic 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Hybrid Control System) >> Repair Instructions >> Generator Control Module 3-Phase Cable Assembly Replacement (5.3L Engine w/RPO HP2) >> Removal Procedure
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Removal Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Crossbar Bolts & Bar (2WD)
    GM328107Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the battery service disconnect/connect. Refer to Hybrid Battery Service Disconnect/Connect (5.3L Engine w/RPO HP2) .
  2. Remove the intake manifold. Refer to Intake Manifold Replacement .
  3. If vehicle is a 2-wheel drive (2WD), support the engine with a suitable adjustable jack.
    IMPORTANT: If the vehicle is a 2WD, it is necessary to remove the crossbar, in order to lower the transmission to access the 3-phase cable connections.
  4. If vehicle is a 2WD, remove the crossbar bolts and bar.
    5. Fig 2: Identifying Transmission Mount Nuts
    GM647997Courtesy of GENERAL MOTORS CORP.
  5. Remove the rear propeller shaft. Refer to One-Piece Propeller Shaft Replacement .
  6. Remove the front propeller shaft, if equipped with 4-wheel drive (4WD). Refer to Front Propeller Shaft Replacement .
  7. Support the transmission with a transmission jack.
  8. Remove the transmission mount nuts.
    9. Fig 3: View Of Transmission Crossmember
    GM702036Courtesy of GENERAL MOTORS CORP.
  9. Remove the transmission support bolts and nuts.
  10. Raise the transmission slightly and remove the transmission support.
  11. Remove the catalytic converter. Refer to Catalytic Converter Replacement (4.3L, 4.8L, and 5.3L Engines) or Catalytic Converter Replacement (6.0L and 8.1L Engines) .
    12. Fig 4: View Of Transmission Heat Shield Bolts & Shield
    GM394459Courtesy of GENERAL MOTORS CORP.
  12. Remove the transmission heat shield bolts and shield.
  13. Lower the rear of the transmission, until the 3-phase cable cover is accessible.
  14. Remove the transmission fill tube nut.
  15. Remove the transmission fill tube from the transmission and position aside.
    16. Fig 5: View Of 3-Phase Cable Bracket Cover Bolt (5.3L Engine w/RPO HP2)
    GM1237060Courtesy of GENERAL MOTORS CORP.
  16. Remove the 3-phase cable cover nuts (3) and cover (2).
  17. Remove the 3-phase cable nuts (4).
  18. Remove the 3-phase cable from the stator studs.
    19. Fig 6: View Of Transmission Crossmember
    GM702036Courtesy of GENERAL MOTORS CORP.
  19. Raise the transmission.
  20. Reinstall the transmission support and bolts.
  21. Lower the transmission onto the support.
  22. Remove the transmission jack.
  23. Lower the vehicle.
    24. Fig 7: View Of SGCM, Cover & Bolts
    GM1237061Courtesy of GENERAL MOTORS CORP.
  24. Remove the starter/generator control module (SGCM) cover bolts, and cover.
  25. Remove the 3-phase cable nuts.
  26. Remove the 3-phase cable from the SGCM studs.
    27. Fig 8: View Of 3-Phase Cable Bracket Cover Bolt (5.3L Engine w/RPO HP2)
    GM1237060Courtesy of GENERAL MOTORS CORP.
  27. Remove the passenger side rear spark plug wire from the coil.
  28. Remove the 3-phase cable bracket nuts (2).
  29. Remove the 3-phase cable, with bracket, from the vehicle.
  30. Remove the 3-phase cable bracket cover bolt (1) and cover (5), if necessary.
  31. Remove the 3-phase cable from the bracket, if necessary.
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