Latch actuator is probably bad an needs replacing . Your best bet , take it to a qualified repair shop. An have it checked .
SOURCE: 2004 envoy xuv tailgate problems
the actuators have a white stem that sticks out of the bottom of them. if you push up on the ones on the driver side it will open the back hatch for you.
SOURCE: Latch won't lock when closing tailgate 2004 Silverado
most likely a broken spring inside latch
SOURCE: 2004 GMC Envoy XUV tailgate won't open downward
Do you live in a dusty area? 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!
SOURCE: tailgate will not open at all, i can unlock the
do you have the tailgate with the window in the upper half and does the window open?
SOURCE: tailgate failure on honda accord tourer 2004
Maybe a little late here but i have a fix for this after turning down my dealers generous offer of a 750gbp fix i did some extensive googling and found this.... With your ignition on open the tailgate using the catch inside then turn off ignition and disconnect the battery for a minute. Reconect the battery and turn on ignition and let the warning lights go through their cycle. With the ignition still on shut the tailgate and hey Presto should be as good as new.
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