Probably already too late, but did you see this Painless Dual Battery setup - https://www.painlessperformance.com/wc/40102
It has indicator lights to tell you what mode of charging is happening or not happening, and I believe can jump start your main battery in an emergency. I had this similar kit in my Chevy Avalanche and had to jump start my main battery on more than one occasion.
Recently installed the S&B with the dry filter option and love the sound and performance. Truck originally came with a K&N CAI but recently decided I didn’t want the open CAI with the opening on top.
My 02 2500hd fells like a newer truck lol. Not. But the new intake looks good in the engine bay.
I got them from Amazon here. I figured I give them a try. They had good reviews and the quality was better than what I expected. Just note the wiring in the back of the pods are not flat with the base. So you can't really put them on a flat surface and have the wire come off to the side without modding the rubber base.
Very cool. Yeah my fogs are HIDs to match my low beam HIDs. I did however put LED in the high beams because when I need to flash someone I don't want to have to wait for the beams to be fully ignited lol.
I just did the amber pod lights on my 02 2500hd. The kit came with 4 pods but only used 3 to space it out some. As far as brightness, they are pretty bright at night. I may put a yellow tint film/protector over them just to tone them down. I wired them directly to existing wiring for LED lights I have inside the cab that switch on/off with a cigarette lighter switch.
I tried LED bulbs in the fog light housing and it just wasn't bright enough. The next photo does show a light line straight across instead of a blast of light with no shape. It's the same 35W as a halogen bulb.