Same issue it sounds to me as wife and I are having with ours. Bought Sept 30th, 2020. Our 2021 Tahoe High Country had severe water leak somewhere. Only found out after taking it to car wash and,employee vacuuming the floormats notified me of a wet driver side floorboard. Thank God for her awareness!!! I had my wife sit in the 3rd row driver side and I used water hose and ran water on sunroof. Water was pouring into the 3rd row floor board somewhere. After taking it to dealership the rear drain tube from sunroof was not properly installed at factory while going down assembly line. I had to fight dealership to get carpet replaced. What is your VIN #??? Curious of production sequence??? I opened a case with GM Corporate and they have escalated the case. Vehicle is still at the dealership.
Our VIN# last six......132712
Jennifer also to let you know I'm pursuing GM to repurchase our vehicle back since it only has 3,800 miles and cost $85,400. And in return we just want a same Tahoe without defects. If not, I'll fight on. We've owned 3 Tahoes and are loyal customers so I'm hopeful! If not, I'll start with my state Atty Gen Office. Some AG Offices have a consumer protection division for issues like these. They work on your behalf and possibly mediate the case. Good luck.