4x4EVRado

I recently purchased a Leer 100S for my Silverado. Today it rained for the first time so I can check for leaks. I noticed signs of water coming in just inside the tailgate on either side of the bed. I'm purchasing HD seals for the rear window but I wanted to see if anyone has recommendations for Tailgate seal kit for a 2015 Silverado? I've been searching but am hesitant to spend money to be back at the beginning. Hoping someone else may be able to save me the hassle?