I experienced a massive shatter/cracking in my windshield when my 2015 was a little over a month old. Driving down one of our more notorious freeways, something struck the windshield, which sounded like a .50 cal striking armor plating (THUMP!). The wife was sitting on the passenger side and both of us jumped, (she had her sun visor tilted down) but we saw nothing. It was a mystery and I said, "How did that not shatter the windshield? Whatever that was".
Once we got home and she climbed out, I put her visor up and saw the impact, something struck the windshield right at the upper edge, where it meets the body.At the velocity I was traveling (75+/-), that object, had it hit an inch or two lower, there's little doubt it would have gone right through the windshield and probably struck her in the face, neck or chest, killing her.
I had no idea what it was, if it was a rock tossed up by a tire, or if someone tossed something off the overpass we were crossing under, but it left a Quarter-sized impact on the glass and spider web cracks radiating outward.
Thankful she wasn't hurt, I called my insurance company and filed a claim. After a brief conversation with the adjuster, they covered it and insisted it be replaced with OEM glass (as the truck was so new, there were no aftermarket parts available anyway). They recommended Safelite (which I probably would have called as well with their terrible commercials and that awful jingle..."Safelite repair, Safelite replace"... (sorry) I called them and within two days they came right to the house and replaced the windshield in about 4 hours.
The cost to do so was my deductible, 250.00. If I had to pay cash for it, it would have run around 2000, plus labor. I don't know what the cost for them now is, though I'd imagine a windshield for a 19 will run the same +/-.
While my issue was related to an impact, I did have an experience with a rental, that had a cracked windshield. Earlier the same year, before I purchased my Yukon, I needed to rent a Suburban for a special project where my 93 C3500 just wouldn't work. I reserved one a month prior to needing it and when I went to pick it up, the previous renters brought it back with a crack in the windshield, going from the bottom of the left side of the glass, just offset center by about 4-5 inches, and traversing up through the windshield. They had no others available and I needed it that week, taking it anyway with the caveat of the broken windshield being there prior to my renting of the vehicle.
Throughout the week, the crack went from 9", all the way to the upper windshield, where for whatever reason, it turned 90 degrees and moved parallel to the top of the windshield making it's way towards the passenger side. I pondered the issue about cracking windshields and GM's SUV's myself.
I have not had an issue with my replacement windshield on my Yukon and hope it stays that way. Good luck with your insurance/warranty. I hope you're able to get it replaced, if not under warranty then at least with minimal OOP expenses.
