To the point on the jack, it's rated for about 3,000 lbs. That's more than the Rebel should weigh at any wheel under normal circumstances, and it's capable of lifting the truck just high enough to replace tires if you use it in the proper location.
With that said, there are instances of the jack failing. It has a pretty small base compared to typical hydraulic jacks. This makes it very susceptible to shifting on any uneven ground. I have one buddy who had his jack fail on his Ram when he tried to lift up the rear tire. He had an ATV in the box, which should not have been enough weight in the rear to cause jack failure. It broke at one end of the scissor and collapsed. I got to see it later. Cracked and split around the pivot point where the scissors meet at one end and the screw joins it.
I had one fail once on a wet gravel road. It twisted / slipped on the gravel and ended up looking more like a pretzel than a scissor jack. I had gotten all the loose pebbles out from under it but it appeared that the road surface sunk a bit under one side of it.
So the jack is rated enough for the application, and the same style of jack is supplied with millions of cars. They are normally adequate for the job, but you should never trust them enough to crawl under the vehicle.