I just ordered one for my 2025 Yukon XL AT4 Ultimate last Thursday. Just got the email that they were building it today, and it'll ship after this week!
I finally got around to installing my brand-new CORSA Catback Exhaust installed on my 2025 GMC Yukon XL AT4 Ultimate ( 6.2L ). Here's a quick little video of it with a "Warm Start" vs. "Cold Start"