Two problems related to rear window wiper washer have been reported for the 2005 GMC Envoy. The most recently reported issues are listed below.
2005 GMC Envoy xl back rear door window bracket detached the first time, the second time the bracket itself broke and shattered the rear window. This is a design flaw that people all over the the country have experienced. I am trying to get warranty to cover it but they keep telling me they don't cover broken glass, well if the bracket didn't snap in 2 the glass would not have broken. I am very lucky I was not blinded by the explosion of glass. I took pictures which show pieces of glass over 20 feet away. I also read post by other people where children were cut in the face a scarred by this same event.
The wipers were the first to go. That needed a control module the touch pads for the tail gate were next. First the drop down then the swing. Then the right side passenger door inside handle stopped working. Then the left side rear door outside handle doesn't work. Then the four wheel drive doesn't work then the fuel gauge doesn't work now the passenger's window doesn't open 5th speed on the heater stopped working what is the matter with GMC? that is a high end vehicle and as such should not be plagued with such problems.