Dennis Prior

I have a new to me 2022 GMC3500 Denali, and have a couple of things I wish to add electrically, is there anywhere I can access a circuit that is switched , under the dash or somewhere else, thought there would be spare switches and circuits on this truck . Thanks.

New member here, and a new too me 2022 GMC 3500 Denali diesel, I like to do my own maintenance and was wondering if this year of truck has two fuel filters, I know about the one under the truck but is there another one on the engine, my 2003 duramax had one on the engine with a primmer pump, love the new truck by the way !!