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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Manual Transmission - NV 4500 - Service) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different variant/trim than selected.
  1. Shift the transmission into 3rd or 4th gear.
  2. Remove the shift lever assembly. Refer to Shift Lever Assembly Replacement .
  3. If vehicle is a 2 wheel drive (2WD), remove the propeller shaft. Refer to Propeller Shaft Replacement - One Piece or Propeller Shaft Replacement - Two Piece .
  4. If vehicle is a 4 wheel drive (4WD), remove the transfer case. Refer to Transfer Case Assembly Replacement (NVG261-NP2) or Transfer Case Assembly Replacement (NVG261-NP1).
  5. Using J 42371  , push back on the white plastic sleeve on the quick connect in order to separate the hydraulic clutch line from the clutch actuator quick connect.
    Fig 1: Separating Hydraulic Clutch Line From Clutch Actuator Quick Connect
    GM102888Courtesy of GENERAL MOTORS CORP.
  6. Disconnect the following engine wiring harness electrical connectors:
    • Backup lamp switch (1)
    • Vehicle speed sensor (VSS) (3)
    • Oxygen sensor (4)
      • Fig 2: Disconnecting Appropriate Electrical Connectors
      GM775031Courtesy of GENERAL MOTORS CORP.
  7. Remove the oxygen sensor (2) from the transmission bracket.
  8. Remove the engine harness clips from the fuel feed/return line clip/bracket.
  9. If equipped with 4WD, remove the vent hose clip from the bracket.
    Fig 3: Remove Vent Hose Clip From Bracket (4WD)
    GM775346Courtesy of GENERAL MOTORS CORP.
  10. If equipped with 4WD, remove the vent hose clip (1) from the fuel feed/return hose bracket.
    Fig 4: Removing Vent Hose Clip From Fuel Feed/Return Hose Bracket (4WD)
    GM775339Courtesy of GENERAL MOTORS CORP.
  11. If equipped with 4WD, remove the fuel feed/return hose clip from the bracket.
    Fig 5: Removing Fuel Feed/Return Hose Clip From Bracket (4WD)
    GM775356Courtesy of GENERAL MOTORS CORP.
  12. Remove the starter. Refer to Starter Motor Replacement (4.3L Engine) , Starter Motor Replacement (4.8L, 5.3L, and 6.0L Engines) , Starter Motor Replacement (8.1L Engine) or Starter Motor Replacement (6.6L (LLY) Engine) .
  13. Support the transmission using a suitable transmission jack.
  14. Remove the transmission support. Refer to Transmission Support Replacement .
  15. Disconnect the vent hose from the transmission.
    Fig 6: Disconnecting Vent Hose From Transmission
    GM775337Courtesy of GENERAL MOTORS CORP.
  16. Remove the vent hose clip from the clutch housing.
  17. Remove the transmission to clutch housing bolts.
  18. Remove the transmission from the clutch housing.
    Fig 7: Removing Transmission From Clutch Housing
    GM775391Courtesy of GENERAL MOTORS CORP.
  19. If required, remove the clutch housing bolts/studs.
    Fig 8: Removing Clutch Housing Bolts/Studs
    GM775394Courtesy of GENERAL MOTORS CORP.
  20. If required, remove the clutch housing.
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