GM Service Manual Online
For 1990-2009 cars only

Sunroof Housing Rear Drain Hose Replacement Upper

Removal Procedure

  1. Remove the rear quarter trim panel. Refer to Quarter Upper Trim Panel Replacement.
  2. Remove the headliner in order to access the upper rear drain hose connections. Refer to Headlining Trim Panel Replacement.

  3. Object Number: 1938912  Size: SH
  4. Disconnect the rear upper drain hose (1) from the sunroof spout (2).

  5. Object Number: 1938920  Size: SH
  6. Disconnect the rear upper drain hose (2) from the rear drain tube (1).
  7. Remove the rear upper drain hose (2) from the rear of the sunroof module.

Installation Procedure

    Important: The only suitable lubricant is clean water for the drain hose installation.


    Object Number: 1938920  Size: SH
  1. Connect the rear upper drain hose (2) to the rear drain tube (1).

  2. Object Number: 1938912  Size: SH
  3. Connect the rear upper drain hose (1) to the sunroof spout (2).
  4. Inspect for proper drainage.
  5. Install the headliner with the aid of an assistant. Refer to Headlining Trim Panel Replacement.
  6. Install the rear quarter trim panel. Refer to Quarter Upper Trim Panel Replacement.

Sunroof Housing Rear Drain Hose Replacement Lower

Removal Procedure

  1. Remove the rear compartment side trim panel. Refer to Rear Corner Trim Panel Carpet Replacement.

  2. Object Number: 1938906  Size: SH
  3. Disconnect the rear lower drain hose (1) from the rear drain tube (2).

  4. Object Number: 1938856  Size: SH
  5. Disconnect the rear lower drain hose (2) from the rear drain hose grommet (1).
  6. Remove the rear lower drain hose (2) from the vehicle.
  7. Important: Heat the rear lower drain hose grommet to aid in removal.

  8. Remove the rear lower drain hose grommet (1) from the vehicle.
  9. Scrape the remaining adhesive of the rear lower drain hose grommet from the rear inner wheelhouse.

Installation Procedure

    Important: The only suitable lubricant is clean water for the drain hose installation.


    Object Number: 1938796  Size: SH
  1. Install the rear lower drain hose grommet (1) to the rear inner wheelhouse.
  2. Heat the rear lower drain hose grommet (1) to allow adhesion of the sunroof grommet to the rear inner wheelhouse.

  3. Object Number: 1938856  Size: SH
  4. Install the rear lower drain hose to the vehicle.
  5. Connect the rear lower drain hose (2) to the rear lower drain hose grommet (1).

  6. Object Number: 1938906  Size: SH
  7. Connect the rear drain hose (1) to the rear drain tube (2).
  8. Inspect for proper drainage.
  9. Install the rear compartment side trim panel. Refer to Rear Corner Trim Panel Carpet Replacement.