2015 Suburban leaky sunroof seal. How to remove sunroof

The seal leaks.

There should be drains at each corner, these drains have plastic tubes that remove the water.

But the drains will plug, when they do, the seal leaks

You need a very flexible, very small snake to clear the drains

Years ago, living room windows were covered with a very thin material call shear drapes.
They were installed using a very thin coiled wire, just looks like a small white snake.
That's what I use to keep the tubes clear.
Be careful not to knock/push the tubing off the drain

No, too big, too stiff.