GM Service Manual Online
For 1990-2009 cars only

Front Output Shaft Seal Replacement TrailBlazer EXT, Envoy XL, Envoy XUV

Tools Required

J 45236 Output Shaft Seal Installer - Front

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
  3. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .

  4. Object Number: 747076  Size: SH
  5. Remove the dust shield from the front output shaft.

  6. Object Number: 749437  Size: SH
  7. Lightly tap the screw driver around the edge of the front output shaft seal.

  8. Object Number: 749435  Size: SH
  9. Pry the front out shaft seal from the transfer case.

  10. Object Number: 749438  Size: SH
  11. Remove the front output shaft seal from the transfer case.

Installation Procedure


    Object Number: 765966  Size: SH
  1. Install the J 45236 on the front output shaft.

  2. Object Number: 765968  Size: SH
  3. Align the front output shaft seal on the J 45236-2 (1).
  4. Using the J 45236-1 (2), install the front output shaft seal.
  5. Remove the J 45236-1 and the J 45236-2.

  6. Object Number: 747076  Size: SH
  7. Install the dust shield on the front output shaft.
  8. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement .
  9. Inspect the transfer case fluid level. Refer to Transfer Case Fluid Replacement .
  10. Install the transfer case shield, if equipped. Refer to Transfer Case Shield Replacement .
  11. Lower the vehicle. Refer to Lifting and Jacking the Vehicle .

Front Output Shaft Seal Replacement TrailBlazer, Envoy, Rainier

Tools Required

J 45236 Output Shaft Seal Installer - Front

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  2. Remove the fuel tank shield, if equipped. Refer to Fuel Tank Shield Replacement .
  3. Remove the front propeller shaft. Refer to Front Propeller Shaft Replacement .

  4. Object Number: 747076  Size: SH
  5. Remove the dust shield from the front output shaft.

  6. Object Number: 749437  Size: SH
  7. Lightly tap the screw driver around the edge of the front output shaft seal.

  8. Object Number: 749435  Size: SH
  9. Pry the front out shaft seal from the transfer case.

  10. Object Number: 749438  Size: SH
  11. Remove the front output shaft seal from the transfer case.

Installation Procedure


    Object Number: 765966  Size: SH
  1. Install the J 45236 on the front output shaft.

  2. Object Number: 765968  Size: SH
  3. Align the front output shaft seal on the J 45236-2 (1).
  4. Using the J 45236-1 (2), install the front output shaft seal.
  5. Remove the J 45236-1 and the J 45236-2.

  6. Object Number: 747076  Size: SH
  7. Install the dust shield on the front output shaft.
  8. Install the front propeller shaft. Refer to Front Propeller Shaft Replacement .
  9. Inspect the transfer case fluid level. Refer to Transfer Case Fluid Replacement .
  10. Install the fuel tank shield, if equipped. Refer to Fuel Tank Shield Replacement .
  11. Lower the vehicle. Refer to Lifting and Jacking the Vehicle .