I have an RV and have found the best method of mouse control yet. It's a product made by a company in the Toronto area called "Mouse Free". It's a petroleum based product with a peppermint scent that deters mice. Looks like a peppermint laced "Fluid Film". I trapped over 50 mice one winter in my RV and since applying this every two years to the frame rails of my RV I haven't seen a mouse since.
They advertise it for use on RV motorhome Chassis so I don't see any reason you couldn't use on our trucks. I'd be inclined to spray it under the hood to deter mice and also provide some corrosion prevention.
They advertise it for use on RV motorhome Chassis so I don't see any reason you couldn't use on our trucks. I'd be inclined to spray it under the hood to deter mice and also provide some corrosion prevention.