Writing to follow up with my leak issue. After many lengthy talks with GM Customer support, and my local Chevy dealer, i ended up gettin gin touch with the dealer where i purchased the truck (4.5 hours away). They told me that if i brought it in to them, they would do everything they could to get it corrected for me. They diagnosed the leak as coming from the spoiler and dripping along the power slider window frame to the drivers side corner, and NOT the window itself. Turns out it just needed 8 new bolts and some new sealer around the spoiler. I have yet to pick up he truck and have it out in a storm, so will keep the thread up to date. Hope this helps anyone who is told that the window is leaking and it wont be replaced under warranty!