Can I get an A/C wiring diagram?

Here are pictures of the switch and the connector, although in my truck the switch is red, this purple one is the same female shape. The new connector just has two white wires, and I’m trying to figure out what wires within the wiring harness I need to connect them to. Looking at the diagram I think the switch is the A/C refrigerant pressure sensor, but there are 3 wires going to that (red/black, grey, and black.) This is where I’m confused. I’ll look into that link and see what I can figure out.

Unfortunately, I’m still a little confused. In the wiring diagram you sent me before, it shows the low pressure switch as being on the accumulator. The switch I’m trying to connect to is mounted in the rear of the compressor, and it looks exactly like the pictures I sent yesterday. I’m starting to wonder if this switch is not actually essential for the compressor to work. I looked at the diagram a while and can understand how it all works. Without the switch I’m referring to. I’m still curious as to what this switch is for though. On the maps website it calls it the high pressure cutout switch, and exactly resembles the switch in the compressor on the truck that currently has nothing plugged into it, and no connector to be found. I’m going to test the 3 wire connector (A/C pressure sensor), and the 2 wire connector (low pressure switch). I remember seeing a red/black wire that was not connected so I will try to repair that now knowing that it is for the 3 wire connector. Furthermore I am curious to know the purpose of the red switch in the back of the compressor. Maybe the compressor came out of a Chevrolet of a different year? Thank you for all the help, I certainly have gained a better understanding of this electrical system.

Can I get the diagrams for a 2003 GMC Yukon 6.0L?