Wiper problems of the 2017 Cadillac XT5

While driving down the freeway at approx. 65 miles per hour, I heard a very loud sound like an explosion, or a huge balloon exploding, and then heard crackling of glass. It was very scary and dangerous. I had to slow down immediately, and was able to get off the freeway. I pulled into a gas station, and tried to figure out where it came from. I realized that my sunroof was either hit with something or just simply exploded. There was a hole in the center, and the glass was cracked throughout the front sunroof. I could hear the glass pieces moving around on the sunroof shade that was thankfully closed. I bought duct tape and covered the hole and all of the cracks so I could drive it home. I took side streets and drove slowly home.

There is an open service bulletin on my car - 17128 potential loss of hvac control. This loss of control affects the defrost on the vehicle making it very dangerous to drive when it is raining out as it severally reduces visibility.

Our Xt5 began getting 'steering assist reduced' message about a year ago. It comes and goes , coming more often now. The problem is the thermostat and is a very common issue with numerous complaints here and on Cadillac forums (below). The problem is, when this issue occurs the ac stops working, and when that happens you have no windshield defrost, and that is a safety problem. Cadillac has TSB's describing this issue but refuses to cover it goodwill as we are slightly out of warranty. The repair is extensive, requiring 4. 5 of time. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

#1 I have problem viewing thru windshield because light beige dashboard reflecting onto the inside of the windshield (sun glare). . . #2 I have hard to see rearview when back up because too dim backup lamps. . .