Plugged Drain Hose

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

If a waterleak has occurred check for a plugged drain hose at each corner of drainage system.

Open the sunroof window.
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.
CAUTION: Wear safety glasses in order to avoid eye damage.
Use compressed air, 241 kpi (35 psi) or less to blow out any drain hose that is plugged.
Test the system again.
If the hose remains plugged, check to see it is properly routed and does not have a kink. Refer to Drain Hose Routing.
Remove the hoses that remain plugged.
- For front hoses, Refer to SUNROOF DRAIN HOSE REPLACEMENT - Front
- For rear hoses, Refer to SUNROOF DRAIN HOSE REPLACEMENT - Rear
Remove the blockage using the following steps.
1. 7.1. Push mechanics wire through the hose to remove the obstruction.
2. 7.2. Use compressed air in order to blow out any remaining material.
3. 7.3. Reinstall the hose. Refer to Drain Hose Routing.