Do you have a grab handle mounted inside the cab that your wife can grab and help pull herself up into the cab? If she can open the door, garb a hold of a handle that she can pull herself up onto the running board and then into the cab, that might help a lot.
My buddy's wife has MS. For years he has used a small 2 step stool he puts on the ground (stores it behind the seat on his extended cab truck) for her to step on to get into and out of his truck. The step stool and the grab handle has worked for them for several years.
We have a sept stool and there’s aN OE grab handle. The step stool is a PIA, unfold and fold every time we use it. I’ve tried several stools but none are as steady as the trucks side board. It just needs to be a little lower.
