Slide outs stuck - 2 out and 1 in.

[Pilgrim49]

Hello, we have a 2015 LaCrosse 328RES. We just brought it home from its safety inspection and parked it in the barn (literally). I slid out the two LR slide outs but left the BR one in. A couple of days later I attempted to slide the BR slide out out and - nothing. No movement, no noise, no anything. The same with the LR slide outs. Nothing. The breakers and the fuses in the panel look ok, but none of them appear to have anything to do with the slide outs. Since none of them work I am assuming it is something in common with all of them such as a breaker. Where might I look for a breaker/fuse for these stuck slideouts? Or what should I be looking for if not a breaker? I'm connected to shore power and everything else appears to be working.