How to open liftglass on tailgate

[JPB07Denali]

I have a 2007 Yukon Denali XL. It has 204,500 Wisconsin salty miles.
The rear window wiper stopped working so I am on a mission to diagnose it and fix it.
The wiper was functioning well before it died.
I checked the fuse by the drivers side and it has 12 volts and is good.
This led me to look at the tailgate area. The wiring bundle going into the top of the tailgate looks okay - not chaffed.
I removed the upper inner trim facia trim ring and I can not find an electrical connector to test.
Now I want to remove the big lower inner trim facia piece so that I Can see everything on the inside of the tailgate.
I have watched several you tubes which show two push pin type clips which hold the top of the panel to the tailgate frame.
The challenge is that I have to open the liftglass to access those two push pins.
My liftglass does not open when pushing my key fob or the manual "A " button located outside on the passenger side of the tailgate. I can not open the glass. I have checked a few more fuses but no fuse seems to exist for just the glass actuation. I have never used the liftglass feature during the last 9 years and I don't p[lan on using it in the future.
Is there a trick way to get that liftglass hook latch to release?
Any comments or suggestions will be appreciated.
Thank you.
J.Peter

 

[swathdiver]

A bi-directional scan tool might be able to open it, if the wiring is intact. If not, I don't know off-hand. @iamdub @Doubeleive

 

[Doubeleive]

i have not had to or tried to remove the hatch trim on this gen but I know the 2 clips you are reffering to, I would assume you could just force it off if had to
but I would wait for others input first.
I assume the front roof switch does not operate it either?

 

[iamdub]

I've never fully removed mine. I've just separated the lower half to install convenience lights. I bet you could pop it off as much as possible and reach up in there with a coat hanger or something and release it.

 

[randeez]

I have a 2007 Yukon Denali XL. It has 204,500 Wisconsin salty miles.
The rear window wiper stopped working so I am on a mission to diagnose it and fix it.
The wiper was functioning well before it died.
I checked the fuse by the drivers side and it has 12 volts and is good.
This led me to look at the tailgate area. The wiring bundle going into the top of the tailgate looks okay - not chaffed.
I removed the upper inner trim facia trim ring and I can not find an electrical connector to test.
Now I want to remove the big lower inner trim facia piece so that I Can see everything on the inside of the tailgate.
I have watched several you tubes which show two push pin type clips which hold the top of the panel to the tailgate frame.
The challenge is that I have to open the liftglass to access those two push pins.
My liftglass does not open when pushing my key fob or the manual "A " button located outside on the passenger side of the tailgate. I can not open the glass. I have checked a few more fuses but no fuse seems to exist for just the glass actuation. I have never used the liftglass feature during the last 9 years and I don't p[lan on using it in the future.
Is there a trick way to get that liftglass hook latch to release?
Any comments or suggestions will be appreciated.
Thank you.
J.Peter

dumb question but you did push and hold either the fob or the button on tailgate?

 

[iamdub]

dumb question but you did push and hold either the fob or the button on tailgate?

"I have never used the liftglass feature during the last 9 years..."

You might be on to something here.

 

[randeez]

"I have never used the liftglass feature during the last 9 years..."

You might be on to something here.

thats how mine works..and the hold seems oddly longer than it should be, thats why i mention it

 

[iamdub]

thats how mine works..and the hold seems oddly longer than it should be, thats why i mention it

Yeah, you're right. Holding it has just become second nature. If OP has never used the feature, he might not know to hold it for the full 750 milliseconds to activate it. I think the same thing when I press and hold the button under the applique.

 

[Doubeleive]

"I have never used the liftglass feature during the last 9 years..."

You might be on to something here.

I use the glass when I load it up with groceries or whatever, but the wiper never gets used

 

[randeez]

I use the glass when I load it up with groceries or whatever, but the wiper never gets used

i use the glass more often cause my tailgate doesnt work unless key is on

 

[Doubeleive]

i use the glass more often cause my tailgate doesnt work unless key is on

that's weird do the seat's work without the key on?

 

[JPB07Denali]

Thanks guys,
I just went out and tried again. I held the outside button for 10 seconds and the Key FOB for 10 seconds as well. I also tried the same thing with Key On and KEY OFF.
Still no clicking and the window is still firmly latched.
Thanks
J.Peter

 

[Doubeleive]

Thanks guys,
I just went out and tried again. I held the outside button for 10 seconds and the Key FOB for 10 seconds as well. I also tried the same thing with Key On and KEY OFF.
Still no clicking and the window is still firmly latched.
Thanks
J.Peter

In all likelyhood the reason the glass will not open is because of the rear wiper. there is a safety interlock to prevent the glass from opening if the wiper is on or if the wiper arm is not "parked" properly.

 

[randeez]

that's weird do the seat's work without the key on?

its a no power to the vss after trans swap problem. with no power the mph maxes out.
i need to find some wake up power to send to it havent gotten around to it

 

[JPB07Denali]

Problem solved!
When I changed my oil and filter a week ago I reset the oil life to 100%.
AS I reset the oil life I fumbled around with the DIC screen options, as I always do, until I found the place to reset. I must have changed the "Auto lock" somehow because I fiddled around with that feature reseting it now and all of a sudden the liftglass now opens as it should.
Ironically the rear wiper started to work again as well.
Clearly a Safety Lock overload for an 80 year old driver.
Thanks
J.Peter