This may not apply to older trucks but might apply to those with the new fobs. That got me to wondering. For those vehicles equipped with upfitter switches, could a key ignition circuit be tied to one of those switches? For example, could the ignition be disabled unless and until, say, switch 5 is activated? Most thieves would not likely know to play with the upfitter switches while trying to steal a car, even if they had a fob or some way to override it. Based on the advice of another person posting, I now carry the big bulky fob on a carabiner, but that is inconvenient carrying that around for days on end when not driving the truck. I would like to leave the fob in the truck when parked in the shop, but that is a risk if someone should break into the shop. And running back and forth between the shop and the house to retrieve the fob is a nuisance when shop and house are at a distance. Yes there are other ways to deal with this problem, but would tying the ignition to a switch solve the big fob problem while offering additional protection against hot wiring?