My 97 silhouette short wheelbase also got 26.5-27 MPG pure highway, with AC on and at extra-legal speeds. It was the only year without a driver's sliding door and the resultant weight. The aerodynamics came at the cost of poor rear cylinder head access but what transverse V6 van doesn't have this problem? Poor chap who owned it before me paid for the IM gaskets....
It was "born" a few inches narrower than most American vans, so they could use the same chassis in Europe. I didn't miss the width; in fact, I think a 4x8 plywood barely fit between the wheel wells.
It wasn't 20-star crash rated, but there were some weird braces underneath that looked intended to augment crashworthiness.