Please include the year,make,model,sub-model,engine,2wd,4wd,flex,gas,diesel. Please click accept when done, thank you and come back often.

Would that be the same as a liftgate? I see a Emergency Release for Opening Liftgate on page 2-14 of your owners manual which I uploaded here, http://www.mediafire.com/?vzea65p0y6lrrno It says,

1. Remove the trim plug to expose the access hole in the trim panel. The access hole is located on the inside of the liftgate.
2. Use a tool to reach through the access hole in the trim panel.
3. Pry the left release lever up to the unlock position. Pry the right release lever up to unlatch the liftgate.
4. Reattach the trim plug.

Now, on getting to the window regulator, give me a few minutes on that but I did find a Endgate Window Learn Cycle, click here, that has to be performed anytime A service part has been installed in the vehicle, An endgate module has been swapped from one vehicle to another, Loss of battery while the window is moving, Any fault condition, DTC B3966, which causes the window to enter the window fault state or an Installation of a new window regulator into a vehicle.

I don't have any reference to the tailgate in the chilton manual, but there is a procedure for the window regulator assembly on power door locks, click here. Perhaps that along with some diagrams would help. The parts store is calling it either a Endgate or Midgate.

Number 8, REGULATOR E/GATE WDO,(INCLS 34),(INCLUDES MOTOR).

Number 8, REGULATOR M/GATE WDO.

I read this in Chilton, "WARNING
Important: The driver information center (DIC) will display the message See Manual - Tailgate anytime a learn is required except after the installation of a new regulator. When a module is not learned, or in a window fault state, only the window remains functional."

1.Activate the window up switch using the key cylinder or overhead console switch and maintain switch activation for 2 seconds after the window has stalled in the fully closed position.



WARNING
Important: The window may be in any position to start the re-learn, but the up operation must be performed first.




2.Activate the window down switch and maintain switch activation for 2 seconds after the window has stalled in the fully open position.

Here is a whole page of gates but I still don't see a tailgate.

http://www.compnine.com/index.php?t=1&year=2004&majorgroup=17&supplgroup=NULL&catcode=56S&modelcode=S&makecode=LG&grouptype=B&modelid=6750&uid=1

Let me check these other manuals I have. BRB.

Try cleaning the optical sensors they talk about here.

"My sister lives in dusty New Mexico and had a malfunctioning XUV tailgate. My reasoning was that something must tell the tailgate not to drop down if the glass is up, and if it can't tell, then it will only open sideways.
So we removed the trim panel, and the tailgate was indeed full of dust. By reaching my arm in, I found two plastic optical sensors which tell the gate whether the glass is up or down; both were coated with dust. After cleaning these the tailgate was back to its normal operation. The two sensors are flat, round - about the size of a nickel or dime...I couldn't see them, just found them by guessing that they must be there. Hope this helps

"

http://www.fixya.com/cars/t4462514-2004_gmc_envoy_xuv_tailgate_open

I'm stuck to searching the web. I've read over 3 sites so far and noone yet has mentioned an emergency opening.

Check the problem someone found here.

http://www.fixya.com/cars/t1709786-2004_envoy_xuv_tailgate_problems

"I fixed both switches on my 2004 XUV. If you unscrew them from the back and take the switch itself apart you will probably find some corrosion on the one wire inside. I cleaned it up and added a drop of solder to make the connection. Both switches had the same problem and now both work fine."

TaDa. Figures the answer came from this very website, I see someone here found the emergency release and he said it is a tailgate, also.

http://www.justanswer.com/gmc/45jai-2004-gmc-envoy-rear-window-will-not-go-down-unable.html

Its a little piece of metal on drivers side sticking out of a control box of some sort. It takes a good deal of force to release the latch.

See if it is here.

Pay whenever you want to, I will still be here no matter what. First of all have you found a new regulator yet?

I got like 4 spots I shop for dealer parts. I like http://www.gmpartsgiant.com/ because they have good diagrams, too. But http://www.autopartscenter.net/ sometimes is cheaper but no diagrams, then there is http://www.compnine.com/ I like them cause they too have diagrams, plus they list the rpo codes. Once you find the part number it gets much easier, these sites have a search feature by part number. Plus, compnine if you click on the part number it shows you every vehicle the part fits. Plus, there is http://www.gmpartsdirect.com/ again no diagrams though.

Give me a few minutes and let me see who has the part and then I will look up any instructions on replacing it.