Rear latch??

[OriginOfKaos]

What year is "the Yukon?"

1998!

 

[OriginOfKaos]

It’s hard to tell from the angle, but it looks like your latch is in the closed position. If the dash switch won’t trip it, turn the tailgate key and pull the thing (pawl?) down. Try spraying it with some lithium or dry/silicone lube, maybe it’s just gummed up.

Open latch, glass will close:

View attachment 411089

Closed latch, turn the key and pull the pawl toward you:

View attachment 411090

Thank you for the help. I will give that a try!!!