2010Tahoe lift gate not opening & how to connect rear right light?

[mememe]

Hi there,
I have a chev 2010 Tahoe and i drilled a hole where the lift gate latch is, so i could manually unlock the gate. It opened, but once i closed it , it became stuck again. WD40 it, and still wont open. Any idea of what i should do before i take it to a garage? Trying to save $$.
Also, backed into something and cracked/broke my right passenger tail light. Ordered replacement off Amazon, . Took old light off, and when I went to plug new one it, found the plug to be under the back of the vehicle. Not easy to reach and a bit corroded. I was too afraid to grab at it as I laid on my back on the road. I don't want to pull or break anything, I just want to unplug it, and plug the new assembly in. How do i safely unplug the old ...its attached underneath and I dont see anyway of dislodging it. Wish it had been just tucked into the light, and not stuck on the underside where I cant get at it or unplug it.

Let me know your thoughts!!!

 

[Fless]

What does the new taillight look like? Does it come with a pigtail like the picture below?

 

[mememe]

What does the new taillight look like? Does it come with a pigtail like the picture below?

View attachment 487754

Yes, it look like that! I’m going to get pillows and crawl under to see how to undo the clip so I can connect new rear light assembly. I just don’t want to break anything. Thank you for replying to me. I’ll see if I can take a picture under the bumper where it’s clipped.