Acadia , GMC, 2008, repair, drain hose, leak,
Put twists on safety wire about 4 feet long. Using an electric drill run the safety wire down in both forward tubes. Then pour a cup of water into each tube at front corners of sunroof to make sure obstructions are clear. You will see water come out by each front tire.
The drain hoses typically run from the 4 corners of the pan around the sunroof. Usually the blockage is from the top side, so open the sunroof and clean from there. Some applications require that you drop the ceiling material for access.
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