Went into garage and started vehicle to warm it up. Went inside house and about 15-20 minutes later I heard a loud explosion. Went into garage to investigate and saw that the rear hatch window had exploded for no reason at all. Thank God I was not standing behind vehicle when this happened or I would have had some serious injuries from the glass exploding everywhere. This trailblazer has been nothing but a headache since I bought it. Chevy needs to address the exploding window issue before someone gets hurt!