Help with repairing crack around window

Thanks for all the info folks.
I think I'm going to take this long holiday weekend to pull the rear window and see if there is anything else I need to know about this before I try to fix it. I'd hate to go through the process of fixing it and find out later that water has got in somehow and caused problems.

Parbond might seal that if it's leaking water.

By the photos provided it does look like some previous repair may have been done there.

Take the picture to a truck (semi) body shop they can repair easier then RV shop

In the first photo it looks like there is a rusting screwhead behind the window frame to the left of the crack. To me it seems someone tried to repair a problem like delamination or ?

The crack looks like a stress crack and needs to be fixed or it may keep growing. One method is to drill a hole in the siding at each end of the crack. Sand down the area and then fill with hair bondo. It's a Bondo product pre mixed with 1 inch strands of fiberglas threads.

Last step is to finish the repair off with regular bondo and sand smooth, then paint. There are some YouTube videos showing RV siding repair.

I don't think just a reseal will work as it is actually a little dent like something has hit it. You can see in the second picture between the quarter and the far left crack it is actually about a 1/16th inch gap between the window frame and gel-coat.
I'm trying to avoid taking it to a dealer at all costs :)

i would suggest that an RV shop inspect the crack to determine if it would be better to pull the whole window out and reseal it. Or, if you get lucky that can just reseal the cracked area.