Montana, Silhouette, Venture 2000-2005

Removal & Installation

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  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove the air cleaner and duct assembly.
  6.  
  7. Remove the wiper linkage.
  8.  
  9. Remove the heater hoses from the heater core.
  10.  
  11. Remove the lower center console.
  12.  
  13. Remove both instrument panel insulators.
  14.  
  15. Remove the heater outlet module screws.
  16.  
  17. Remove the heater cover.
  18.  
  19. Remove the heater core mounting clip and line clamp screws.
  20.  
  21. Remove the heater core.

    Click image to see an enlarged view

    Fig. View of the front heater assembly-Chevrolet Venture



    Click image to see an enlarged view

    Fig. Exploded view of the front heater ventilation system-Chevrolet Venture

  22.  

To install:

  1. Install the heater core.
  2.  
  3. Install the heater core mounting clip and line clamp screws.
  4.  
  5. Install the heater cover.
  6.  
  7. Install the heater outlet module screws.
  8.  
  9. Install both instrument panel insulators.
  10.  
  11. Install the lower center console.
  12.  
  13. Install the heater hoses from the heater core.
  14.  
  15. Install the wiper linkage.
  16.  
  17. Install the air cleaner and duct assembly.
  18.  
  19. Refill the cooling system.
  20.  
  21. Connect the negative battery cable.
  22.  
  23. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  24.  

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove the air cleaner and duct assembly.
  6.  
  7. Remove the wiper linkage.
  8.  
  9. Remove the heater hoses from the heater core.
  10.  
  11. Remove the lower center console.
  12.  
  13. Remove both instrument panel insulators.
  14.  
  15. Remove the heater outlet module screws.
  16.  
  17. Remove the heater cover.
  18.  
  19. Remove the heater core mounting clip and line clamp screws.
  20.  
  21. Remove the heater core.

    Click image to see an enlarged view

    Fig. View of the front heater assembly-Oldsmobile Silhouette



    Click image to see an enlarged view

    Fig. Exploded view of the front heater ventilation system-Oldsmobile Silhouette

  22.  

To install:

  1. Install the heater core.
  2.  
  3. Install the heater core mounting clip and line clamp screws.
  4.  
  5. Install the heater cover.
  6.  
  7. Install the heater outlet module screws.
  8.  
  9. Install both instrument panel insulators.
  10.  
  11. Install the lower center console.
  12.  
  13. Install the heater hoses from the heater core.
  14.  
  15. Install the wiper linkage.
  16.  
  17. Install the air cleaner and duct assembly.
  18.  
  19. Refill the cooling system.
  20.  
  21. Connect the negative battery cable.
  22.  
  23. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  24.  

  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove the air cleaner and duct assembly.
  6.  
  7. Remove the wiper linkage.
  8.  
  9. Remove the heater hoses from the heater core.
  10.  
  11. Remove the lower center console.
  12.  
  13. Remove both instrument panel insulators.
  14.  
  15. Remove the heater outlet module screws.
  16.  
  17. Remove the heater cover.
  18.  
  19. Remove the heater core mounting clip and line clamp screws.
  20.  
  21. Remove the heater core.

    Click image to see an enlarged view

    Fig. View of the front heater assembly-Pontiac Montana



    Click image to see an enlarged view

    Fig. Exploded view of the front heater ventilation system-Pontiac Montana

  22.  

To install:

  1. Install the heater core.
  2.  
  3. Install the heater core mounting clip and line clamp screws.
  4.  
  5. Install the heater cover.
  6.  
  7. Install the heater outlet module screws.
  8.  
  9. Install both instrument panel insulators.
  10.  
  11. Install the lower center console.
  12.  
  13. Install the heater hoses from the heater core.
  14.  
  15. Install the wiper linkage.
  16.  
  17. Install the air cleaner and duct assembly.
  18.  
  19. Refill the cooling system.
  20.  
  21. Connect the negative battery cable.
  22.  
  23. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  24.  

Front



  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove the air cleaner and duct assembly.
  6.  
  7. Remove the wiper linkage.
  8.  
  9. Remove the heater hoses from the heater core.
  10.  
  11. Remove the lower center console.
  12.  
  13. Remove both instrument panel insulators.
  14.  
  15. Remove the heater outlet module screws.
  16.  
  17. Remove the heater cover.
  18.  
  19. Remove the heater core mounting clip and line clamp screws.
  20.  
  21. Remove the heater core.

    Click image to see an enlarged view

    Fig. View of the front heater assembly-Chevrolet Venture, Oldsmobile Silhouette, Pontiac Montana and Trans Sport



    Click image to see an enlarged view

    Fig. Exploded view of the front heater ventilation system-Chevrolet Venture, Oldsmobile Silhouette, Pontiac Montana and Trans Sport

  22.  

To install:

  1. Install the heater core.
  2.  
  3. Install the heater core mounting clip and line clamp screws.
  4.  
  5. Install the heater cover.
  6.  
  7. Install the heater outlet module screws.
  8.  
  9. Install both instrument panel insulators.
  10.  
  11. Install the lower center console.
  12.  
  13. Install the heater hoses from the heater core.
  14.  
  15. Install the wiper linkage.
  16.  
  17. Install the air cleaner and duct assembly.
  18.  
  19. Refill the cooling system.
  20.  
  21. Connect the negative battery cable.
  22.  
  23. Run the engine to normal operating temperatures; then, check the climate control operation and check for leaks.
  24.  

Rear Heater Core



  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a clean container for reuse.
  4.  
  5. Remove the left rear side quarter trim.
  6.  
  7. Remove the rear heater hoses from the rear heater core.
  8.  
  9. Remove the bracket bolt securing the hoses to the heater core.
  10.  
  11. Release the rear heater core-to-rear heater housing tabs.
  12.  
  13. Remove the heater core.

    Click image to see an enlarged view

    Fig. View of the rear auxiliary heater assembly ventilation system-Chevrolet Venture, Oldsmobile Silhouette, Pontiac Montana and Trans Sport



    Click image to see an enlarged view

    Fig. View of the rear auxiliary heater assembly-Chevrolet Venture, Oldsmobile Silhouette, Pontiac Montana and Trans Sport

  14.  

To install:

  1. Install the heater core.
  2.  
  3. Connect the rear heater core-to-rear heater housing tabs.
  4.  
  5. Install the bracket bolt securing the hoses to the heater core.
  6.  
  7. Install the rear heater hoses from the rear heater core.
  8.  
  9. Install the left rear side quarter trim.
  10.  
  11. Refill the cooling system.
  12.  
  13. Connect the negative battery cable.
  14.  

 
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