sorry do not know on that model, but doubt it will just pull off, are the wires soldered or on push on connectors, if push on you may see a screw after removing them, Rick
If it's like the older trucks then the connector does pull off the switch but will probably have some kind of clip. As ricks says should then see the screw. Main thing is you've identified the switch now. It's so tight for space isn't it.
I decided to have a pull at the white plastic and it came off turned out to be the socket, as you said there was a philips screw holding the switch it is very hard to get at that screw eventually I manage to remove it I used a philips bit and unscrewed it using my fingers. I have ordered a new switch will pick it up Wednesday. Thanks Jims-terrano and solarman216 for your help
took a photo of removed plug Just getting use to photobucket