Here's what I think happened, based solely upon my recollection of that long-ago conversation with the inventor at a time when things were tied-up legally and he really couldn't say much. All of the following is just my conjecturing and filling in of the blanks. I was in a similar situation with a patented invention of my own at the time (getting screwed by the big manufacturer who wanted it for free. I "took my ball and went home" rather than watch someone else profit from my hard work while I got practically nothing. ), so we had a good talk and it was of great interest to me. If someone has better knowledge, I have long wanted to know the details and ultimate outcome. Please share.
The Big Three (though deservedly not so "big" anymore), have rights to body shapes and designs. Trademarks, I believe they are considered. Whether it is more like a copyright or patent, I don't know.
But you may remember that about the same time Hide'n Side was introduced, there were a number of companies who were marketing conversion kits to take Dodge pickups like ours and Chevy pickups (maybe others, too) and convert them into "hummer lookalikes". They were very cool "poor man" kits and drastically improved the offroad capabilites with terrific entry and departure angles and engines moved back in the frames, etc. It was an excellent way to turn beloved rusted out Chevy 4x4's into awesome looking and performing "new" vehicles. Cummins Dodges, too.
AM General sued and shut them all down. Simply because they "looked" like Hummers and the General wanted to keep Hummers as high-end rich dude toys. The courts bowed to their wishes.
There was another lawsuit brought by Daimler (I can't remember against who, though) for trying to introduce a vehicle that Daimler felt too closely emulated their "trademark" Jeep vertical grille.
Ok, so along comes the absolute hottest thing to hit pickups in years: the Hide 'n Side. All three corporate giants drooled over it. I'm sure they also berated their own design teams for not thinking of it.
The inventor had it nailed-down and patented. Trouble is, by marketing them, he was also in violation of the Big Three's "Trademark" rights, since they HAD to look just like the real thing. So they tried to squeeze him out and refused to pay for his idea. He stood his ground and said "Ok. I'll just take my ball and go home. "
The Big Three are actually quite happy about that outcome. Sure, none of them can steal his design concept and profit from it; but that's just fine with each of them since the competition doesn't have it either. The inventor cannot continue to manufacture and market them, either . All is well except that we, the deserving consumer, and the deserving inventor end up with nothing.