The drain trough in the sunroof module provides adequate water drainage. The drain trough encircles the sunroof glass panel and leads to the drain hoses. The sunroof drain hoses are located in each corner of the sunroof housing. A drain channel spans the rear of the sunroof module. The drain channel directs water into the trough. The front drain hoses are routed down the windshield pillars and out the center of each pillar between the upper and lower door hinges. The rear sunroof drain hoses are routed down the B, C, or D-pillars and out the rear quarter panels.

Caution: Wear safety glasses in order to avoid eye damage.

Important: Care must be taken when using compressed air to clear the sunroof drain hoses. Do not exceed 241 kPa (35 psi).

If a wet headliner or other water leaks occur, verify that the drainage system is not plugged or disconnected. This should be done before performing any adjustments to the sunroof glass panel. Inspect for a plugged or disconnected drainage system by opening the sunroof glass panel and pouring a small amount of water into the sunroof module drain trough. If the water flow is restricted, use a flexible wire or 241 kPa (35 psi) of compressed air to clear out any material plugging the drain system.

Retest the system for proper water drainage.

If water drainage is still not adequate, the headliner will need to be removed to inspect for the proper routing of the sunroof drain hoses. Refer to Headlining Trim Panel Replacement in Interior Trim.

Allow only a minimal gap between the roof and the weatherstrip. The seal fit is essential to assure that the water and debris going to the sunroof drain hoses is not excessive. Objectionable wind noise may result if the clearances are exceeded. Make sunroof glass panel to roof adjustments by adjusting the height and centering the sunroof glass panel. Refer to Sunroof Window Height and Opening Fit Adjustment .