hi Jhyp, truckernix is correct, there is a tab to pull the light out with it's socket assembly. see attached photo light_tab.jpg and light_tab_2.jpg you pull straight back on the tab about 1/4 inch to unlock it, then it sorta twist and giggle and work it out of the unit, it will come with 1 wire, it grounds to the chassis. i included views so you have an idea what it looks like in there
i have contemplated if it is possible to replace this bulb without removing the radio, it might be... in theory see photo radio_bottom.jpg if you can undo the two housing screws on the bottom, the whole back will slip off without removing the radio from the truck, this perhaps is possible to then change tubes and this bulb. i haven't had to go back into my radio since installing it yet let us know how it goes thanks -s
