Three problems related to rear window wiper washer have been reported for the 2004 GMC Envoy. The most recently reported issues are listed below.
I purchased a 2004 GMC Envoy xuv and have several significant problems with this vehicle. After researching it seem others have had the same troubles. Since we owned the vehicle, the rear window is found down and noone was even in/near the vehicle. It continues to work but still will go down by itself. A year ago I had to replace the fuel tank, this was right after we took it in for inspection on a recall of smelling gas fumes while driving and possible corrosion in fuel lines. Of course the fuel lines were not corroded so we were told. I footed the bill $800+ to get a new fuel tank ,as neck on tank was cracked and was told that this is why we smelled gas. Luckily, I went to my garage and saved several hundred dollars from the dealers cost to repair. Last weekend 9/10/10 my family was driving to town and the middle window unexpectedly dropped and now does not work. I researched an it seems to be a regulator issue and will cost around $500, wow! over the last two weeks there is a rattle when we turn on our ac. Again after we were in for service as we had the ac charged at the start of summer. I can see where I have the same troubles as a lot of others and feel, the same as they do, left holding the bag by GMC and no way out but, to look for a new/used vehicle and get rid of this vehicle.
After storing cargo in the rear of my 2004 GMC Envoy xl, I reached for the handle on the tailgate to close it and once I started to pull down an inch or two the entire rear window shattered. There was no warning or cracks or damage in the glass prior to the incident. I was covered in a shower of glass and shards were in the car, on the ground and in my skin. I have owned the vehicle approx three years and it currently has 88k mi on it. The entire rear window needs to be replaced. Based on my research I fear this may happen again which would be hazardous to anyone in the vicinity.
I experience ear pain if I drive while all windows are down. (particularly the back windows). Y rear windshield wiper failed to work for no reason. The next time I got into the car, it worked.