After returning home from shopping, my wife and her friend pulled into our driveway and she placed our Trailblazer in Park. There was a loud sound she said sounded like an explosion and the rear lift hatch window shattered sending glass flying. At the time of the glass shattering the outside temperature was close to 30 degrees. The rear defroster was not on. I came home from work and we cleaned all the glass from the driveway and the interior of the vehicle. There was no explanation as to why this happened. I contacted the insurance company and the window was fixed for a cost of $754.70 by Safelite Glass Repair. I looked on the internet and did a search of similar incidents and found quite a few. I contacted GM by e-mail and told them what happened. GM thanked me for the information but did not offer any replacement or reimbursement. Fortunately no one was injured and our granddaughter was not in her car seat at the time. This could have been very dangerous if my wife would have been opening the lift gate when the glass shattered. GM said this appeared to be an isolated incident and I offered to send them links to other identical complaints that I found. I would like the NHTSA to please look into this as this does NOT seem to be an isolated incident and there was no warning of this failure. The glass was in excellent condition prior to this happening and the vehicle has never been in an accident and is in excellent condition.

Fathers day I Took my car in to Walmart to have a tire that was flat replaced after about 40 mins the Manager came in and asked me to come to the service bay area.Their sat my car with a blown out rear window, the manager said they didn't know what happened they where just replacing the spare tire and all of a sudden the rear window just blew .He said that there is a video and the security company would let me no what they see I'd like to see the video myself to see if they bumped something I'll keep you informed.

This is the 2nd time that the rear window has literally "blown up" on this particular vehicle. The first time my wife was at a busy grocery store when she started to lower the back hatch and the entire back window exploded. It was so loud and devastating that she thought someone had fired a shotgun into the back window and as a result the glass was sent flying all over the place! The dealership replaced the window in 2008 as a courtesy.

Less than two weeks ago it happened again as I dropped my two young children off at school. I opened the rear hatch (for the 4th time that morning) , removed their school bags, shut the hatch and took approximately 3 steps and Kapoww! The entire window exploded right in the school's bus circle. The explosion was so great that it even blew one of the window lift cylinders right out into the road!! The wife wasn't kidding...the sound is deafening.

Contacted GM and was told that a technical bulletin was issued 03-08-48-006G Rev. Feb 25th 2010) regarding the replacement of the window clips. I was issued a Case no. In essence I was told that if the clips weren't replaced it would happen again. Well unfortunately this bulletin wasn't available in 2008 so it happened again.

Contacted customer service again, was told vehicle has too many miles, is no longer under warranty, the original repair was only good for 1 year, and that this is "my baby' to deal with. BUT the service rep offered me $1000.00 GM loyalty bucks (something like this) that I could use on a new GM vehicle.

I am furious to say the least and when I asked for the name and number of the customer service rep's supervisor he told me that I could have the name, but not the number, as his supervisor doesn't speak to customers!!!!

HELP?? I don't want to eat the cost of this obvious defect!