Ok, so like the title says, is this even possible to do? I've been scouring here, LS1tech, and the general internet for a couple hours now and while everyone and their cousin is willing to sell you a new set of these with a pigtail, I just want to know if it's possible to de-pin the plugs on the engine harness so I can sleeve everything up without cutting the commons. Hell, I could have cut and resoldered them in the time I've spent, but I prefer to not butcher the harness any more than I have to...

 

The terminals look like they have a t shaped lever that stands up, and would require a release tool inserted from the injector side for release. Sorry, none here on hand to check.

 

You can depin them. They're pull-to-seat terminals, so its a pain to extract. Slide the seal from the rear of the connector and insert the terminal release tool (paperclip isnt the best for this style). Once you hit the retainer tab (not easy even with the proper tool) the wire can be pushed through the connector out the front