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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1622 (Manual Transmission - NV 3500) >> Repair Instructions >> Transmission Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Shift the transmission into 3rd or 4th gear.
  2. Remove the shift lever assembly. Refer to Shift Lever Assembly Replacement   . 
  3. Drain the transmission fluid.
  4. 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 .
  5. If vehicle is a 4 wheel drive (4WD), remove the transfer case. Refer to TRANSFER CASE ASSEMBLY REPLACEMENT for Transfer Case-NVG 236/246-NP8 (Two Speed Automatic) or TRANSFER CASE ASSEMBLY REPLACEMENT for Transfer Case-NVG 261-NP2 (Two Speed Manual).
  6. 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.
    7. Fig 1: Separating Hydraulic Clutch Line From Clutch Actuator Quick Connect
    G01953015Courtesy of GENERAL MOTORS CORP.
  7. Disconnect the following engine wiring harness electrical connectors:
    • Vehicle speed sensor (VSS) (1)
    • Backup lamp switch (3)
    • Oxygen sensor (4)
  8. Remove the engine harness clips from the fuel feed/return line clips and transmission.
  9. If equipped with 4WD, remove the clamp securing the harness to the fuel feed/return pipe bracket.
    Fig 2: Vehicle Speed Sensor, Backup Lamp Switch & Oxygen Sensor
    G01953016Courtesy of GENERAL MOTORS CORP.
  10. If equipped with 4WD, remove the vent hose clip from the bracket.
    Fig 3: Removing Vent Hose Clip From Bracket
    G01953017Courtesy of GENERAL MOTORS CORP.
  11. 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
    G01953018Courtesy of GENERAL MOTORS CORP.
  12. If equipped with 4WD, remove the fuel feed/return hose clip from the bracket.
  13. Remove the starter motor. Refer to STARTER MOTOR .
    Fig 5: Removing Fuel Feed/Return Hose Clip From Bracket
    G01953019Courtesy of GENERAL MOTORS CORP.
  14. If equipped with the 4.3L engine, remove the transmission cover bolts.
  15. Support the transmission using a suitable transmission jack.
  16. Remove the transmission support crossmember.
    Fig 6: Removing Transmission Cover Bolts (4.3L)
    G01953020Courtesy of GENERAL MOTORS CORP.
  17. Remove the bolts securing the bottom right side of the transmission to the engine. Bolt (1) secures the transmission cover on 4.3L engine only.
  18. Remove the transmission cover.
    Fig 7: Removing Transmission Cover
    G01953021Courtesy of GENERAL MOTORS CORP.
  19. Remove the stud securing the right side of the transmission to the engine.
    Fig 8: Removing Stud Securing Right Side Of Transmission To Engine
    G01953022Courtesy of GENERAL MOTORS CORP.
  20. Remove the transfer case vent hose clip bracket nut and bracket.

    On the 4.3L engine this bracket is located at the 1 o'clock position and on the 4.8L engine this bracket is located at the 12 o'clock position.

    Fig 9: Removing Transfer Case Vent Hose Clip Bracket Nut & Bracket
    G01953023Courtesy of GENERAL MOTORS CORP.
  21. Remove the bolt and studs securing the transmission to the engine.
  22. Pull the transmission straight back off the clutch hub splines. Do not let the transmission hang from the clutch assembly.
  23. Remove the transmission from the vehicle.
    Fig 10: Removing Bolt & Studs Securing Transmission To Engine
    G01953024Courtesy of GENERAL MOTORS CORP.
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