So my wife's grandmother is in the hospital in Sherman, Texas so we took the two hour drive from our house up here for a Sunday afternoon sick visitation and we'd kill two birds and visit her paternal grandfather who lives in Dennison nearby. Well, before heading out the tires looked a bit low so I pumped them all up to make them equal and headed out. One of them looked a little off, but it was just above the wear mark and it looked pretty good from my eye so I gave it a thumbs up and we headed out. Well, we got on I-75 and we were going at a steady 65 MPH speed and we passed a broken-down car and my wife asked me what we would do it we got a flat tire, I was about to say that we hadn't had one in a LONG time when ... THUMP THUMP THUMP THUMP ... the right-rear tire blew out on us. It didn't just blow out, buit the side wall disentegrated!!! As luck would have it, we were not in a place that we could pull over very easily, too many cars going by ... so I drove past the next on-ramp and we had enough room. I ended up calling the GM Motot Club where I have a policy, but I didn't have the membership card. That's ok, they said, they would honor it. That's pretty cool. I ended up figuring that I would be able to change it myself ... BIG mistake, as I had to kneel down it a big pile of ants and chiggers. Yuck. I got the wife and the kids off into the grass ... more ants and chiggers! So it took me about 25 minutes to get the spare tire down, the Trailblazer jacked up, the shreded tire off, the spare tire on and back ont he road. The city of Anna police stopped by to help divert traffic, officer Harris I think was his name. Then we get up here and we look at the other tires, not looking all that great, so we're going to stay overnight and maybe get a new set of rubber tomorrow at the Discount Tire or maybe just Wally World if they have some BF Goodrich or comparable tires. So we're up here, end up having the baby throw up all over us, my oldest boy was cranky from traveling so far and getting out in the sun for 30 minutes, the wife threw her back out some how and I'll got to get us all up early tomorrow morning. I think this covers under the GM Motor Club "accident" policy as we are over 100 miles away from home right now and it was probably some road debris (!) that caused the tire to explode like that in seconds. The'll cover us for a place to stay and reasonable stuff like food and a rental car ... not gonna need that, just need some new shoes on the TB and we'll be good to go back home tomorrow late morning. But, WHEW! What a day! We're staying at a Holiday Inn Express and I told my woes to the dude running the front desk and how I need a beer. He said, "you want a beer? We've got some left over from the Happy Hour!". So he got me a couple of semi-cold Coors Lights on the house. That's just awesome! Here's the Trailblazer with the spare tire on it - this is probably the factory spare Here is the shredded tire - the whole tread just about flew off. Never had a tire do this before honestly.