Extra Wide Dog Stairs for Large Dogs, Foldable Dog Ramp for Car with Non-Slip Surface, Dogs Stairs for Cars, High Beds, Truck, Supports up to 250 lbs, 4 Steps

I got some version of these, they are all about the same. Get the 5 step size. I just keep em in the spare tire compartment with my other stuff and pull them out when needed. Dogs took to them in 2 or so attempts and now they know the drill no problem! https://a.co/d/0eDAH971