Ways to prevent leaking and general tips for my new to me 2021

[TXHammer]

Picked up a mint 2021 with 16k miles. I have heard so much about these trucks leaking from the rear window, third brake light and cab vents.  what can I do this week to seal this thing up properly? Also, anyone have issues with the panoramic sunroof leaking?  I will also be doing preventative maintenance on my exhaust manifold once the warranty gets closer to going out, but anything that any of you guys have done to make yours less of a headache please let me know, thanks!

 

[boogielander]

put a camper on top to prevent excessive water in that area and you're gonna be fine lol

 

[HSKR R/T]

I have a 2020 with 55k miles and not a single leak. It didn't effect every truck

 

[scottmoyer]

The '21 didn't the leaks from the 3rd brake light if I recall correctly.

The rear window is a different story though. Get some Permatex flowable caulk from the parts store and slowly run it along the upper rear window channel. Be sure to add extra in the corners so it will flow down the sides of the rear window. If done correctly, nobody will ever know it was done, except that you won't have a leak!