That looks the same as my sierra did, same colour/engine/age
Mine ran sweet as a nut so felt guilty for the first 5mins of ripping it to pieces
systematically ripped to bits of course
If you are using the loom make a good job of labelling it and storing it for when you need it. I spent a full day carefully removing the whole thing in one piece and very neatly labelling it.
I have just recently stripped the loom down and got it in the roadster at the weekend, the labels really helped make sense of it quickly