The sliding glass panel is designed for controlled water entry at the seal. A properly adjusted glass panel will result in a snug fit between the weather-strip and the roof. The fit can be tested by inserting a piece of paper between the roof and the weather-strip. When the glass is in the closed position, the piece of paper should have some resistance when pulled out. A minimal gap is essential in order to assure that the water to the sunroof drain hoses is not excessive. Also, objectionable wind noise could result if the gap clearances are exceeded. Adjust the height and the centering of the glass in order to align the sunroof window to the roof. Refer to Sunroof Window Height and Opening Fit Adjustment .

A drain trough in the sunroof module provides adequate drainage. this trough encircles the sliding glass panel and leads to drain hoses located in each corner of the housing. In addition, a drain channel spans the rear of the sunroof module. This 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 the lower door hinges. The rear drain hoses are routed down the rear pillars and into the trunk.

When correcting a wet headlining or other water leak complaint, first verify that the drainage system is not plugged or disconnected before you make any adjustments. Use a pint container in order to pour water into the module housing the drain trough. If water flow is restricted, use compressed air in order to blow out any material plugging the drain system. Retest the system.

In order to further test for disconnected drain hoses without removing the headliner, remove the sunroof control switch and the sunroof opening trim lace around the sunroof opening. Then lower the headliner as required.