GM Service Manual Online
For 1990-2009 cars only

Sunroof Drain Inspection and Cleaning Fixed Roof Window

Inspection and Cleaning Procedure

Ultra View roofs have 1 drain, located under the roof side trim covers, in each rear body pillar.

  1. Lower the rear headliner. Refer to Headlining Trim Panel Replacement.
  2. Remove the rear stationary window. Refer to Sunroof Window Replacement.
  3. Pour a small amount of water into the sunroof module drain trough. Inspect for a plugged or disconnected drainage system. If the water flow is restricted, perform the following steps:
  4. Warning: Refer to Safety Glasses and Compressed Air Warning in the Preface section.

       Note: Use care when using compressed air to clear the sunroof drain hose. Do not exceed 241 kPa (35 psi).

    • Use a flexible wire or 241 kPa (35 psi) of compressed air to clear any debris plugging the drain system.
    • Inspect the drainage system for proper water drainage.
    • If water drainage is still not adequate, remove the headliner. Inspect the sunroof drain hoses for proper routing. Refer to Headlining Trim Panel Replacement.
  5. Install the rear stationary window. Refer to Sunroof Window Replacement.
  6. Install the rear headliner. Refer to Headlining Trim Panel Replacement.

Sunroof Drain Inspection and Cleaning Rear Vent Window

Inspection and Cleaning Procedure

  1. Move the rear window to the vent position.
  2. Pour a small amount of water into the sunroof module drain trough. Inspect for a plugged or disconnected drainage system. If the water flow is restricted, perform the following steps:
  3. Warning: Refer to Safety Glasses and Compressed Air Warning in the Preface section.

            Note: Use care when using compressed air to clear the sunroof drain hose. Do not exceed 241 kPa (35 psi).

    2.1. Use a flexible wire or 241 kPa (35 psi) of compressed air to clear any material plugging the drain system.
    2.2. Inspect the drainage system for proper water drainage.
    2.3. If water drainage is still not adequate, remove the headliner. Inspect the sunroof drain hoses for proper routing. Refer to Headlining Trim Panel Replacement.
  4. Install the rear headliner, if necessary. Refer to Headlining Trim Panel Replacement.