A drain trough encircles the sunroof glass panel and water drains off by the drain hoses located at each corner of the housing. A drain channel spans across the sunroof module at the rear of the glass panel and directs water into the trough.

1. Check to ensure the front drain hoses are routed down the windshield pillars and out the center of the pillar between the door hinges. Ensure no kinks in the hoses exist. Replace any torn or cracked hoses. Refer to Sunroof Housing Front Drain Hose Replacement or to Sunroof Housing Rear Drain Hose Replacement .
2. Ensure the rear drain hoses routes through the rear pillars and out of the rocker panel. Ensure the rear hoses are correctly routed in the metal roof slot and taped in place. Replace any torn or cracked hoses. Refer to Sunroof Housing Front Drain Hose Replacement or to Sunroof Housing Rear Drain Hose Replacement .

If a waterleak occurs, check for a plugged drain hose at each corner of drainage system.

1. Open the sunroof window.
2. To test for blockage, pour a small container of water into the module housing drain trough. Check each corner to confirm the drain hose is draining water.
3. Use compressed air, 240 kPa (35 psi) or less to blow out any plugged drain hose.
4. Test the system again.
5. If the hose remains plugged, ensure it is correctly routed. Verify that no kinks exist in the hose.
6. Remove any plugged hoses. For front hoses refer to Sunroof Housing Front Drain Hose Replacement or to Sunroof Housing Rear Drain Hose Replacement .
7. Remove the blockage using the following steps:

7.1.	Push mechanics wire through the hose to remove the obstruction.

7.2.	Use compressed air to blow out any remaining material.

7.3.	Install the hose. Refer to Drain Hose Routing.

Inspect the drainage system for disconnected drain hoses. Complete the following steps in order to obtain partial access to drain hoses and check for a disconnected hose:

1. Open the sunroof glass panel.
2. Withdraw the headliner from around the sunroof module.
3. Remove the power sunroof switch. Refer to Sunroof Switch Replacement .
4. Lower the headliner as needed. Refer to Headlining Trim Panel Replacement in Interior Trim.
5. Connect any disconnected hoses.
6. Ensure the rear drain hoses are properly routed in the metal roof slot and taped in place.