Yep ^^^
For the 1998 - 2004 Sevilles ..............
The front 2 tubes come out just inside the plastic wheelwell liner, up about a foot from the lower edge. They run from the front corners of the sunroof drain pan, down through the a-pilllar covers.
The rear tubes exit down in the front area of the wheelwell. Open the trunk and remove the carpeting from the inside of the inside of the body fenderwell. You'll see where the tubes drop down from the sail panels and disappear up into the headliner. They're attached to the rear corners of the drain pan and are inaccessible without removing the headliner.
Leaking/weeping sunroof glass seal is the clogging culprit. It takes monthly maintenance to keep a good seal. Get the tubes clean and flowing - using a slight incline and car orientation you can check one tube at a time for flow: The lowest corner should drain first, using a small cup of water poured into the channel carefully.
With all tubes clear, open the sunroof to the vent position. Using Armor All or Son of a Gun clean the rubber seal lip. Close the glass and slide it fully rearward. Clean the rubber seal lip as before. Now, using a fingertip, wipe a barely discernible film of silicone dielectric grease on the seal lip and body painted lip. If you can see the grease it's too much. Now close the glass and go to vent position, using the grease on the same lip and body lip. Operate the glass several times. (Silicone dielectric ignition grease. On the counter or sealant racks at any parts store. GREAT for weaherstrip.)
Factory spec for the glass is level with the roof at the front, level to +0.5mm at the rear. The 4 Torx or Philips screws at the inner sides of the glass rails (#2 in the sunroof blowup) are used for adjustment and must be checked for tightness every 6 months. If the sunroof glass is loose or out of alignment it will leak like a sieve and maybe not operate correctly.
Click to enlarge, use your browser <-- to back out.