Wow, that was super helpful! Thank you.Cargo lights are microprocessor controled coming from the Body Control Module (BCM). Internal within the BCM is a common power bus (RPI BUS) that controls other microprocessor controlled circuits like the fog, rear park lamps, overhead console & truck bed lamps that feed off a common fuse F1 (30A) in the Battery Junction Box (BCMC) that goes to the BCM.
There is not a dedicated fuse just for the CHMSL Cargo Lamps. Pulling the F1 fuse in the BCMC will disable not only the CHMSL Cargo lamps but the previously mentioned fog, rear park lamps, overhead console & truck bed lamps.
I have pieced together and attached a PDF showing the wiring path with what I have mentioned.