2004 GMC Envoy Q&A
2004 GMC Envoy Question: I have an XUV and the rear tailgate window won't go up.
RE CHECK WORK SOMETHING NOT INSTALLED PROP. OR PULLED SOMETHING LOOSE. - pushrod
Either a wire harness is wrapped and obstructing something or a harness is still disconnected inside. - csubak30
RECHECK YOUR WORK SOMETHING IS WRONG - globalhelper
Also may have a 'position sensor' in motor that needs some sort of 'reset' procedure , along with re-checking all connectors/ wires.Before you installed the wiper arm , did you cycle the motor once for it to be in the 'park' position and to see if it even worked? Some of the testing would definitely be easier with a second person to operate switch while observing what's happening in the back.Good luck. - ziptie12
I know this question is old, but I am responding so others with the same problem can see. I wired the Rear Window Motor Park Signal wire and the Rear Window Motor Speed Signal wire together and it completely bypassed the rear wiper motor. Now the window goes up and down. This doesn't fix the rear wiper motor, but you will be able to have access to it now that the window is out of the way I made and album to show. http://imgur.com/a/q3vww - XUVowner
I know this question is old but I had the problem of the rear wiper obstruction and couldn't get the rear glass back up so for anyone searching all over the place like I did looking for an answer I found this.... 1: Start with the ignition key in the OFF position 2: turn the ignition Key to the ON position 3: Press the rear glass control switch vent button 6 times 4: Turn the ignition key to the OFF position 5: Press the rear glass control switch vent button 6 more times 6: turn the ignition to the ON position. at this point the rear window will move up and down approximately 20mm (0.8 in). this movement signifies that the rear window glass motor has entered into the initialization mode 7: NOTE: the rear window glass control switch must be held in the UP or DOWN position until the window glass stops moving. failure to hold the switch will end the initialization operation. then the initialization will have to be re-started. Hold the rear window glass control switch in the full UP position until the rear window glass stops in the full up position I found this on a explorer sport Trac forum but it worked amazing and didn't have to do any wiring or take apart the rear door like other posts suggest - nelshcky1919