One problem related to visibility has been reported for the 2005 GMC Envoy. The most recently reported issues are listed below.
At approximately 8 am Friday January 27th I opened the back hatch of my GMC Envoy. Approximately 4-6 inches pulling it down to shut it the entire window shattered all over me, the ground and inside my car. I called my insurance, paid the deductible to have it replaced, it was fixed and then today January 28th, one day after having it replaced I was closing the door again and at approximately the same point in closing it completely shattered again. This is twice in two days. I was told the first time it probably had to do with the weather but the weather was warmer today than yesterday and several forums have shown this problem occurring in all weather conditions. This seems to be a vehicle issue vs a weather issue.