I had just picked up 250 pieces of chicken from giant eagle to feed the homeless at the ywca and placed the boxes in the back of my vehicle. as i drove down the street the window began to fog so i turned on the defrost. within minutes of turning on the defrost, the window shattered into pieces. i ended up having to throw away over 100 pieces of chicken, but luckily no one was hurt. i have called the dealership and filed a complaint with the corporate office, but they say they cannot assist. after speaking with candice at gmc, @866-790-3600 ext 5923331, i was told that the extended warranty i purchased does not cover glass. i bough the car used almost a year ago, purchased the extended warranty to replace the bumper to bumper coverage, so why doesn't it cover glass? what is even more frightening to me is how does a window just shatter? this is a defect that needs to be address and this should be covered by gmc. i have researched and found that this has happened in other gmc vehicles and perhaps this needs to be a class action law suit before it will be properly addressed.