Im looking for help to fix a leak from the draining of the sunroof hatch. i get water in backseat when it rains. im not sure how to fix it so i was looking for pictures or sketches of the draining. where the pipes goes and how to open and replace/fix it!

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Swedish owner of
Buick Park Avenue model 1991 3800 v6

There's a good chance one or both of the rear drain tubes came unattached. You have to pull the c-pillar covers. Bonneville covers pull up and forward, and typically break the tabs... Then pull down the door seals around the rear doors. The back end of the headliner is held up with velcro (on Bonnevilles, I'd guess it's the same with the PA). The drain tubes will be easy to spot when you take the c-pillar covers off. Just follow them to the roof track from there. One of mine had come off before. I pushed it back on and put a fresh zip tie on it to hold tighter, as well as adjusted the sticky pads holding the tube to the c-pillar to give it some slack.

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it seems like the drain tubes have become dried up so they seem to be to short and thereby don not reach its connection at the lower end. do you know if there is a middel connection maybe in the middel of the tube. i mean in the middle somewhere of the c-pillar or maybe just an attachment? when i try to pull the tube up or down it seems stuck. i think i need to replace the whole tube because its not soft and as long as it should be.

its a really tricky thing to losen the passenger roof handles where the lamp is. there are 3 small plastic locks to release it and i almost destryed them trying to get them loose. i need to do this because the inner roof needs to come down a bit so i can reach the drains and fix them. i almost teared the roof apart trying to get it down. i afraid i will tear it apart next time i try fixing it. it does not seem to be made for easy disasembly.

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Swedish owner of
Buick Park Avenue model 1991 3800 v6