Care to speculate?
Right now, the Suburban's sales aren't looking so hot.
And right now, looking around, the mix is about 50% imports, 50% domestics in terms of trucks here.
Many, if not most, consumer trucker buyers (not you of course) never haul anything heavier than a cooler of beer - stand on any major intersection, even in Texas, and count the trucks going thru; what percentage of them are loaded to the hilt for "truck work" or torquing to the max pulling trailers? VS. how many of them are just carrying one guy and an empty bed?
Toyota and Honda are viable competitive choices for people just looking for a "lifestyle" truck, and that's a good chunk of the truck buying consumers.