NHTSA Complaint #11575140 — 2017 RAM 1500

I was going maybe 25mph on wet gravel. I had just put the truck into part time 4x4 because it was starting to snow. With no warming maybe 4 min after part time was activated I got a warning ding and service power steering light and the truck wouldn't turn. I nearly lost control on the snow. Again no warning, it happened all at one and I was unable to control the vehicle. I stopped for maybe 5 min and turned the truck off... when I restarted it the steering worked long enough to turn around on the one way road before the steering once again went out.. no warning just couldn't turn and the light on the dash came on simultaneously. I limped down the mountain at about 10 mph with no power steering. I once again after 30 min or so shut the truck off. Once again when it restarted the power steering works as it should. I'm scared to drive it because it gives no warning before the steering wheele becomes almost impossible to turn. It has since worked on my last two short trips but for how long. And how fast will I be moving the next time it stops working.