In the forward cubbys for sure! Can't see why you could have any issues installing the switch though? Should be some holes in the bottom of the cab to bring it up thru right? (never looked in our trucks but most all have them.)
Never forget, your whole truck is a ground. Just find something metal and connect a ring terminal to itinstalled mine in the Non-cover cubbies like the how to. but 08impulse, you have a short box like me. i spent 20 min looking for the ground that the op in the how to used....and then realized...oh shat, he has a long box. i couldnt find the ground that he used. i ended up grounding them near the tow hitch. pist some pics when ur done. i never uploaded any pics of mine. i need to:headbang: