[str8axle55]

I`m certain GM never offered them from the factory. That is not to say a conversion coach builder never offered one. I know the cab and chassis dualie rears are narrower, and you can tuck them under the stock wheelwells, so you don`t need the dualie fenders. I`ve seen a few of these by me, were all the rage 10 or so yrs ago, Blazers and pickups at least. I did see one Burb like this the other day. The fenders on the movie rig look like narrowed stock truck dualie fenders.