[Maxo16]

Could it be the corrosion on the connections that is causing things not to work? Your fuse panel is really dirty, too. I'd get that all cleaned-up and clean those connections before I tried anything else.

It could be. I'll clean it up and see if that does anything, but mainly I was wondering if anyone knew what the wire attached to the silver pole is for since the one between fender and box is still taped up.

 

[Maxo16]

One of those wires looks burnt too!

Hey thanks for reply. It does look burnt doesn't it lol. Luckily it isn't tho, just built up grease that wiped off. I got the truck rust proofed few weeks ago and haven't got around to cleaning the bay.

Any idea what the wire could be that's attached to the silver pole tho?

 

[Maxo16]

I came across this post on the forum
https://www.silveradosierra.com/threads/need-help-taking-apart-fuse-box.465937/

It has what seems to be the same wire I'm wondering about connected to the silver pole. It's not the one between fender and fuse box.

Any idea what this is meant for?

Was looking at schematics and only other red black wire was something to do with battery isolator, but not sure if it's that wire.
https://www.gmupfitter.com/wp-conte....com/wp-content/uploads/2021/05/2011_LD_ElectricalPickupsChassisCabs_100813.pdf


Page A-12

Page A-70 shows the two other red/black wires that connect to the two terminals.